Sorry for the revival Dan but I need some help please. After we finished the cutting and welding, I was forced(don't ask

) to move the rest of my body work part of the rebuild to a prominent body shop for the blasting, beating , filler work and final painting etc. Did you guys apply the filler directly to the Rust Bullet or did you "prime" it with a sandable primer first ? What type of filler/primer did you use ? I did read on the RB site that you can apply filler/primer directly to RB but I wanted to get your 1st hand experience also please ? Any additional advice is also most welcome