I would second Jeff's comments about spending some time cleaning after you get it back from the sandblasters. Lots of places they can't get to. Especially around the crossmember under the tranny. I think it has some bolts that can be taken off and a sheetmetal cover removed to get get at accumulated grease and grime. I then used a self etching primer (sprayed on) and then a low gloss black enamel over that.