Step 5: Resining the Pepakura
Now comes the messy part. You need to resin the outside, to build up more strength, before resining and fiberglassing the inside. You'll want 30 free minutes for this. In this process, resin is in charge of your time. Once you've mixed it up, you have about 12 minutes to use it before it forms globs.
So to start, find an area that you can stink up with chemicals. A garage or covered outdoor area will work. Follow suit by donning a glove or two and a facemask/respirator. Lay out a few sheets of newspaper(one on top of the other) on your workplace to catch any drips. Make sure your Pepakura piece is fully taped/glued together. Once you've made sure it won't come apart during resining, you can mix up the resin in a container. I use the lid from a quart can of resin, lined with aluminum foil. Follow your resin's instructions for mixing in hardener. I use 6 tablespoons of resin at a time, because I can use it up before it gets useless. Once you have it mixed, dip a 1-inch wide brush(or an old spatula) into the resin and coat the Pepakura. Coat it all over(except the inside), and if you still have some left over, brush it where you started on the first layer. Try not to let any runs or drips form, that makes for extra sanding to do later.