First time with working with the Resin and took some time to learn the process. It was a pretty warm day (90 degree's) so the pot life was really short (10 minutes). I did one at a time and followed the directions in the Assy. manual and all worked out pretty well. I SURE wish I would have installed these prior to the Firewall being installed...but it all worked out okay. The speckly paint worked out well too. I'll let them cure a while then return to finish the body work around the edges.