Ha! I love threads like this. One guy asks a question, and it's a good one, so everyone who reads it chimes in with something related. Good stuff.
Hell, it answered some questions I've been wanting to ask!
And by the way, the Ben Streeper vids, and the Thorssoli's MkVI Costume Buildup (all 89 pages and counting) in the Elite show case are, in my opinion, what make up the "Holy Trinity" (Made up of those two, and the Noob Orientation video) that should be required veiwing and reading for all. I learned a ton from all of those, and I haven't even really done anything yet lol.
Btw, I'm going to be doing The Rondo method for my inside as well. As far as I can recal, it looked like Ben did a 3/4 Bondo, 1/4 resin mixture in a 16 oz cup. Add the right dosage of hardener..mix, pour and slosh around till covered.
Going to try that myself tomorrow.
Good luck to you sir!