Thanks for the info, all. Hopefully I'll have some respectable "after" pictures to post after a few weeks (months?).

I completely took apart the bike earlier today, and that was a blast, in and of itself. Found out I can probably use most of the parts I wanted to. Still have to get a bottom bracket lockring tool to get the bottom bracket off (hopefully not expensive), but I think I can reuse it, too (although it is really crunchy and badly in need of being repacked with grease and new bearings).

Oh---and I also found additional info on this model on Sheldon Brown's "Bridgestone" site. He has a 1987 Bridgestone catalog that features the 300 model. So, I can actually see how this model was originally specced out, and what the paint scheme looked like before 20 years of wear and tear. Pretty cool.

Also talked to a couple of powdercoaters in the Baltimore area, and I'm a little discouraged. One had a minimum price of $135 and the other had a minimum of $150. If I can't find a place any cheaper than that, looks like I'll be pulling out the rattlecans. One benefit to that, though, is that I can be as creative as I want, adding panels designs and such, without it costing a lot extra.