Any welding shop worth its salt can MIG or ARC weld the (iron) fin back on. Depending on how hard it is to get to the break line... will mean how much you'll have to cough up for the weld. As to cleaning the heads (and barrels) for paint... I'd have them (bead) blasted and use some VHT rattle-can from any auto parts store.
As an aside; next time you want to take the heads off the barrels...hit the rocker boxes with a large rubber hammer...not the fins! By: 47Knuckle-Dragger on: 4-18-2008
yeah and don't pry on the intake or exhaust openings either, VOE voice of experience. lol By: MarkGoff on: 4-20-2008
you would be surprised what ya can do with JB Liquid weld. By: MarkGoff on: 4-20-2008