RE: How to Paint: Chemical striper or sand?
I use a 4 inch spiral wound steel wire brush on a small side grinder. It hates paint and doesn't tear up the base metal like sanding, grinding etc. and it's a hole lot easier cleanner and cheaper than caustic paint stripper. There's also no residue to worry about. For smaller areas I use a spiral wound steel 2 inch cup brush. Harbor Freight sells the grinders for 15 bucks and the bruches too. Just remove the grinding wheel and install the wire brush.
ps: it's fast!