Hi guys!
I made a plug of a front bumper a while back before this forum was resurrected (posted different questions on the fiberglast forum).
I made a basic mold in PER/glass becuase the plug was literally falling apart.
I have now made a new part in PER/glass that is of course dimensionally stable now being made from composite and not 3" of bondo. 
I am going to use it to make a proper, multi-piece mold.
However, I’m in a small garage now and the PER smell is just too invasive, so I’m going to start using epoxy.
This is a full front bumper skin, so I need a 1hr working time, but it’s winter so the working temps won’t be very high (will try to keep the garage at 70* though).
So anyways, here are my questions:
-after putting flanges on my new bumper and prepping/polishing in the usual way, can I just use epoxy surface coat in place of gelcoat and carry on as usual?
-Can anyone suggest a resin system? I have a “West System” dealer nearby.
Thanks! I also wanted to mention that I skipped PVA and just used Partall #2 mold wax this time and it worked GREAT!
I also seem to get better at keeping my mess contained with each project. It’s exciting to be getting past ther most miserable part of the learning curve!
Thanks again all!