I am in the final stages for completing a Sig Senior Kadet, and I am looking for the best way to seal the firewall. I am considering either clear dope or epoxy. I really prefer the epoxy, but I know that I will need to thin it a little so that I can brush it.
What is the best method? Can I thin epoxy with acetone (laquer thinner)? or is there something better with which to thin? or is there a better material?

Thanks,
texasaggie72