I've found an old can of SIG clear "Supercoat" butryate dope. What's actually the difference between nitrate and butryate dope? I know you're not supposed to put nitrate over butryate (because the butryate "gasses" longer and causes the outer nitrate layer to debond). But if you're only using one type of dope on a model, does it matter which you use? Also what's the advantage of putting butryate over nitrate?

Finally, what kind of thinner is used? Can I use just ordinary generic brand paint thinner or do I need a "matching brand?" Oh, yeah, and what kind of brush should I use? I'm assuming that a foam brush (my preferred painting tool) would just turn into goo with dope.

While I absolutely hate the dope headaches, the purist in me certainly likes the idea of using the same stuff as "the big boys!"