Ethan, after idiot testing about 10 different kinds of red, I found a Duplicolor rattle can (Cherry Red T199) that when done properly, comes out awsome! The firewall is Krylon Hi-Temp Ceramic Enamel Lo Gloss Black 1634. It's all about the prep time. Lots of different sand papers at different stages and primers.
Cool... as you can see from my firewall, it needs some love. Also, what primer did you use? I think I might try and tackle this same project in a few weeks. :TU:
Ethan, definately good quick satisfaction painting the firewall. With the 1634 you dont need primer. It's thick and covers real nice. You can primer in spots if you had rust and did some work with the wire wheel but, other than that, you don't need to. Start with a good scrub down with a scotchbrite pad and some 409. Get all the nooks, crannies, grease, dirt. Then some cross sanding/etching with about 150 or so. Blue tape and paper real well. Then have a party with the 1634. If you need or want to use primer (I did on my air cleaner and interior for a super smooth finish after stripping down to bare metal, not needed on the firewall) But, for those "spots" I used Grey Krylon Enamel Primer, just to avoid chemical conflicts. You could use a "filler primer" too if you want but, like I said, the 1634 is plenty thick, you'll like it.