Articles:
Gremlins in the Garage!

Getting Started
with
Vinyl Kits
by Denis Bohm
So you finally found that Creature of the Black Lagoon model kit that reminds you of the Aurora kit you built when you were younger. This time you don't want to rush the job by leaving finger prints in the glue that squashed out of the seams or by gloping on a pint of green enamel as the paint scheme. But where do you start? The new kit is not even plastic, it's vinyl. Well, read on to learn the basics that will get you on the road to building and painting that great kit.

Buying

Since you are just starting out you may want to buy an inexpensive kit that is fairly simple. Horizon has a good selection of kits in the $25-$45 range. Other companies to look at are Halcyon, Screamin', Max Factory, and GEOmetric.

Make sure you open the box at the store and check out the kit before you buy. Find a subject that you like and look for an interesting pose. Check the surface for imperfections like air bubbles. Plan out how you would assemble and paint the model. Look for things like capes that hide part of the surface and make them hard to get at when painting. The easiest kit is one that can be completely assembled before painting. The exception is when the seams are setup so that they are hidden and you can paint the subassemblies, like head or arms, and then glue them in place afterwards. You may want to stick to 1/6 scale because there will be a lot less painting involved than if you choose a 1/4 scale model. Also, look at the part count since some of the kits can get pretty complex!

The kit shown here is the Horizon Hulk. This is a great starter kit because it has a great pose, excellent sculpting, few parts, and all the seams are easy to get to.

Steps

Lets go through a quick overview of the steps from box to display: trim, clean,

pin, fill, glue, putty, prime, paint, and seal. Once you understand the basics of each step you should be able to turn out a pretty good kit. Next we'll list the supplies you will need to master the basics: hobby knife, dish soap, tooth brush, plaster, super glue, putty, primer, acrylic paints, wide flat brush, fine tip brush, paint palette, gloves, cloth, plastic cups.

Trimming

The thing to know about vinyl is that when it is heated up it gets pretty soft and cuts like butter. If you try to trim your vinyl kit without heating it up then first lay out all the different sizes of band-aids, the soap, antibiotic cream, and program 911 into your phone so you can call by pressing with your nose. There are two easy ways to heat up vinyl parts. You can use a blow dryer and heat up the parts exactly where you want. This works out pretty well because you can just snap the blow dryer on and reheat a part whenever it starts to cool off. The bad part is that blow dryers often make a lot of noise. The other method is to heat up some water and immerse your parts in the water. Really hot tap water should do the trick. Use a sharp hobby knife and always cut away from all of your body parts. While trimming test fit your parts while they are still hot so you can pop them in and out of any sockets easily.

Cleaning

When vinyl kits are molded a mold release is used so that the vinyl won't stick to the mold. This stuff is still on the vinyl and needs to be washed off so that the paint will adhere properly to your model. Dish soap and hot water works great. Using a tooth brush will ensure that you clean up all the nooks and crannies that make up the great detail in your kit. Dry off your model well after cleaning before going on. After this point make sure to wear gloves when touching your model. You don't want grease from your hands on your model. Plastic gloves work, but tend to wear out fairly quickly. Cotton gloves can be used if you get the kind that won't shed cotton fibers onto your model.

Pinning

To keep your kit stable you may want to pin it to a base. Adding pins to the feet before painting also allows you to attach your kit to a board so that you do not have to touch it's surface during painting. You can use pieces of coat hanger wire, nails, even screws to make pins. Make a hole in the feet where you want to place the pins. Stick the pins far enough into the feet and legs so that they will be well supported. Then fill the feet with a two part epoxy putty or glue. When the epoxy has hardened cut a small board and drill holes for each pin in the appropriate places. This will create a temporary base that you can mount your kit on when you are ready to prime and paint. After your kit and base are painted you can remove the kit from the temporary wood base, trim the pins to their final length, and glue them into the holes in the actual base.

If you need to adjust the stance of your figure you should take care of it at the same time as pinning the feet. Heat can be used to soften the vinyl and bent wire can be inserted into the legs and over the crotch to hold the legs closer together or farther apart. For more details checkout Steve Goodrich's notes on this subject.

Filling

There are three reasons to fill your model. The first is to make it more stable so it won't fall over as easily. The second so that it won't sag or warp later. Third, it may sound silly, but it really feels more like a sculpture than a toy when it weighs more. Inexpensive plaster can be poured into the lower part of the body. Don't put in too much plaster or you will raise the center of gravity and make the model less stable. To get ready for filling, just glue together enough of your model so that the plaster can be poured into the lower parts. Make sure the joints are sealed well with super glue so plaster won't ooze out.

One other way to fill your kit is with Polyfoam. This is a two part mixture that heats up and expands into a rigid foam. Since it heats up and expands you need to be careful about warping the vinyl parts. You can use tin foil to line the vent hole so that none of the foam that expands out of the vent hole contacts the outside of your kit. The hardended foam is easily trimmed with an X-Acto knife. Make sure you use gloves when working with liquid Polyfoam and read the warnings on the label.

Yet another method is to scrunch up packing material and stuff it into the kit. Newspaper or foam packing "peanuts" can be used. Any type of long rod can be used to pack the material into the deep parts of the model.

One brand of filling material to try is Polyfoam.

Gluing

Vinyl parts are really easy to glue. Just be very careful not to get any extra glue anywhere, especially on you! At this point you should have trimmed and test fit all of the parts. This is a good time to use temperature to manipulate the vinyl into just the shape you want. Heat up the parts that you want to adjust, adjust their shape, then cool them off with cold water. The parts should retain their shape after they have been cooled off. When you actually glue the parts a little heat will let you press the parts together and minimize the seams. You only need to wet the joints with super glue to get a great bond. For most uses you want to use super glue and use a "kicker" to instantly harden the glue when you parts are positioned correctly. Make sure you read the warning labels on the glue and kicker.

If the parts don't fit well even after applying heat then you may want to "stitch" the parts together. This is done by gluing a small part of the seam, hitting it with kicker, cleaning it up, and then repeating until you have worked your way around the whole seam.

If you decide to paint some parts before gluing, make sure that you use a hobby knife to trim down to raw vinyl at the joints where you will be applying the glue. Super glue doesn't work well on paint.

Small gaps can be filled by letting a small bead of super glue flow into the seam. As it flows in it should spread out into a nice smooth layer that won't need sanding. Super glues come in different thicknesses. Thicker glues will be able to fill bigger gaps. If the glued area does need sanding don't wait too long, the longer you wait the harder the glue gets.

One brand of super glue and kicker to try is Pacer. An alternative glue to try is UHU Bond-All.

Puttying

Some vinyl kits will have medium and large gaps around the glue joints that need to be filled with putty before painting. Take your time on this step and do a good job because you can't cover problems up later with paint.

For filling medium sized gaps you can use Squadron White putty, then smooth it with a Q-Tip dipped in nail polish remover. To get deep into cracks you might want to try using a putty syringe. If you are careful you may not need to do any sanding when it it dry. If you do need to sand then finish up by smoothing off the putty with a very fine sand paper. Or if you are careful you can touch up the area after it is dried with a Q-Tip dipped in nail polish remover. Squadron has some shrinkage and takes a while to dry, so don't use it for large gaps.

Large gaps can be filled with Milliput White (for smooth areas) or Experts-Choice (for rougher areas). Both are two part epoxy putty. Mix equal amounts of the two parts until the mixture has a uniform color. Press into the large gaps, then with a touch of water on your gloved finger smooth out the putty. If you do a good job with the water you might not have to do any sanding. If you do need to sand then start with a medium sand paper and work your way down to a fine sand paper.

Some brands of putty to try are Milliput, Experts-Choice, Hexcel A&B, Tamiya Polyester, Squadron, and Dr. Microtools.

Priming

Priming your model will make your base coat cover really well, don't skip this step! Spraying on a single light coat is all that you need. A light color like white or light grey seem to work the best for most situations. Dark grey and black can be used for kits that are mostly dark. Make sure you cover all of the model by spraying from all angles. Don't forget to spray up from below and down from above. If you notice any areas that need to be filled better, fix them now. These problems can't be fixed up by painting. Just spray on a very light coat of primer, too much will hide details and look bumpy. Let the primer dry for at least 24 hours before painting. That will give it time to shrink up so that you can see all of the detail and form a good bond with the vinyl.

If you used a primer color other than white then you may want to coat any areas that will have light tones like flesh, yellow, or red with white paint. This will let the final color show without any color distortion from the base coat.

Some vinyls may react with some types of primers. The safest thing to do is to spray some primer on one of the scrap pieces of vinyl that you have left after trimming. Then you can check to see that the primer dries properly and doesn't cause any surface bumps.

Some brands of primer to try are Floquil, Armory, and Krylon.

Painting

Painting will really make your kit come to life, so take your time and watch your back! Painting is a subject all to itself, so read up on painting basics and then move on to sealing your kit.

Sealing

The final step is to seal your great paint job. There are two reasons for sealing: to keep the paint from lifting and to apply a final surface texture. You can create a wet surface look by using gloss coating and a flatter look by using a matte coating.

Some brands of sealer to try are Floquil, Gunze Sangyo, and Krylon.

-----

The Gremlins in the Garage webzine is a production of Firefly Design. If you have any questions or comments please get in touch.

Copyright 1994-1997 Firefly Design.