Richard,
Yeah, I have had my fair share of meetings with Mr. Murphy over the years. He's like the uninvited guest at the party; you don't know why he showed up, and you just can't wait until he leaves!
Painting the firewall before it is installed might be the way to do it. It has always been a challenge getting the engine bay painted after it is completed and closed in. It's like trying to spray paint the inside of a tiny box. Invariably I get dry over spray or runs. Maybe this time itwill be a little easier since the engine bay is somewhat larger than I am used to.
I'm doing a little finish work on the fuselage hatches this weekend. I also think I'm going to prime the fuselage, guide coat it, and block it one more time before I paint it. Hopefully I'll have some color on it this week.
Bill