You're a brave soul to ask a question like that! I'm sure you'll get a different answer for every 2 members, but I'll tell you what I did for my -7.
To clean I started using MEK, but switched to Acetone because I felt it was less toxic (they use it in nail polish remover), then washed with Dawn dish detergent, rinsed well. Then etched with Alumiprep. Then Alodined. Then primed with Akzo.
Unfortunately, the best protection is also the most toxic, so you pay your money and take your choice. I was sold after an A&P ran a file (lightly) over a piece of scrap he primed with Akzo. He didn't bear down on the file of course, but the file didn't remove the primer. By contrast, I tried the self-etch spray can stuff. That came off with a rag wet with alcohol. So I think the Akzo slogan should be, "...let no man put asunder".
Good luck with whatever you choose.
__________________
Tom Costanza
RV-7A Fuse
|