First-time modelers are often scared away from scratch-building. If you aren’t used to working with plastic, the idea of creating a model freehand, without the benefit of a kit can be intimidating. But styrene is actually very easy to use. After a little practice, you may find you can construct a model building from scratch almost as quickly as you can when using a kit.
Tools and Materials Needed
Scratch-building doesn’t really require a lot of fancy tools, although there are many gadgets out there that can make the job easier. The basics you need to get started can be found at any hobby shop for about $10 or less.
Hobby knife: Always use a fresh, sharp blade.Scale ruler: This is the perfect tool for making precise measurements and straight cuts.Sharp pencil: This is the best tool for marking styrene for cutting.Glue: An adhesive designed specifically for styrene will yield much better results.Sandpaper: Keep a variety of fine grits on hand.Compass or French curve: This tool is required only when you are cutting curves or circles.
Lay out your cuts with a scale ruler, and double-check each measurement. Most rulers will not put the “0” mark precisely on the edge, in order to preserve a clean measurement. Always use the markings, not the edge of the ruler, to make your cutting marks. Use a sharp pencil to lay out marks on the styrene. Since most styrene products are white, marks are easy to see. A compass or French Curve can be used to lay out curved lines. After scoring the styrene with light passes of the hobby knife, you can bend the styrene away from the score to snap it cleanly along the line. A second snap in the opposite direction may cause the pieces to separate completely, or you hold the styrene piece bent at an angle, then use the hobby knife to cut a clean line along the backside at the scoreline.
Tips
When making multiple cuts on plastic, it is often easier to make several small cuts, taking off each piece one by one.For windows and doors, you may need to cut all the way through on two or more sides. Often a little gentle flexing will help snap even these smaller areas without damaging the rest of the wall.If you are making walls from a larger sheet of styrene, remove the window and door openings before cutting out the walls themselves.
When sanding, make sure to keep the cut square (unless you are trying to get a beveled edge.) As you learn and are honing your skills, it is often easier to cut a little long and then sand to an even finish. As your measuring and cutting skills improve, you will learn to cut more precisely and less sanding will be needed.
Tip: A heavy-grit sandpaper can be used to scratch a rough surface on the plastic. This can be useful if you want to create a simulated wood grain or other effects.
With your pieces cut, a styrene solvent glue will make quick work of assembling the model, just as you do when building from a plastic kit.
