Based on info from the forum I treated my bare metal with phosphoric, not muriatic, acid and then epoxy primed. The epoxy is still in great shape 3 years later. I did this because I used various hand held stripping devices. I could not get all the rust out of tiny pits and the phosphoric acid converts this to iron phosphate.
The sandblasting should have removed all rust where it could reach. I wouldn't use the extra acid treating if I had my parts sandblasted.
Chuck
