I used a metal flux brush to paint as much as I could reach from the vents, hats, end access holes, etc. The metal flux brush had a metal handle so I could bend it to get up in the nooks and crannies. Did an ok job for rust prevention, I'll leave the color painting to the painter when he does the whole car.
"If it ain't broke, I haven't fixed it yet"
1967 Coupe 333ci CandyApple Red w/red int., AOD, 9" 3.50:1, Front PDB
'09 Warriors In Pink V6 w/glass roof - wife's Stang