interesting answers. thanks.

I have used sandblasters before, all my own art practice, but for cast iron, aluminum, ceramics, and glass. So I am familiar with the mechanics and feel of sandblasters. I chose the acrylic bead media because it seems easier to control and best suited for this project. I've never had to mask any structural object, nor used plastic bead media.

I dont mind taking the time to finish the tight spots myself, What I don't want is to spend hours taking off the base layer getting paint dust everywhere.

Im thinking im just going to mask the hell out of all threaded areas and holes. blast lightly, and finish by hand. Again I really want to avoid chemicals.

its the original paint and i plan on leaving it raw (for now at least)