I have been hardening models as pins and magnets for years. I have used the two part Epoxy Resins - but I do not follow the package instructions. Instead of mixing equal parts of the two components, I had a third equal part of lacquer thinner. That extends my working time from 20 minutes to two hours. The major draw back epoxy is that it is very smelly. If the model is place on the a plastic tarp, the epoxy will peal right off of the tarp. The balance can be trimmed off the model The one problem that I had found with using epoxy on kami paper - is that it turns the paper translucent - which gives a lousy finish or looks like it is grease stained. I have found two work arounds for this. Make the paper into tissue foil or kami foil - with the draw back that is somewhat thicker to fold. The second method is to use an undercoat - several undercoats to be exact. If there is one little pin hole - the epoxy leaks in and leaves a grease stain. My favorite undercoating was J.W.'s Right Stuff - but I find it difficult to purchase. I had tried a Japanese product but it was expensive. I have been using Mod Podge but dilute it. While using the Mod Podge as an undercoating, I have notice that it the smaller models are almost sturdy but still have a lot of flexibility. This is after 5 or 6 thin coatings.
Mark Kennedy
