anyone have bondo tips?

I use a piece of plexiglas to mix on, before the bondo hardens (right when it is starting to) you can scrape off the plex and your tools then clean them up with laquer thinner and a piece of scotch bright. Good call on folding instead of stirring, one thing I was told by a friend that ran a body shop for years though, is to try to put it all on in one coat, because as you are sanding and smoothing it out, the 2nd coat will not stick to the first coat as well as the 1st coat did to the metal, (as you sand, it fills with dust etc...) I however do not do enough bodywork that I get enough on in one coat all the time and have not had issues using multiple coats... The trick is to put more on than you need and use a cheese grater to rough-shape it while it is still soft...