that's correct, good sandblasting leaves the surface with good "tooth" for initial sealing primer - and as said, epoxy primer is the correct thing to use

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature we find it attached to the rest of the world" John Muir
"When we tug a single thing on an old truck, we find it falls off" me
Some TF series details & TF heater pics & Rust-a-holics Unanimous parking lot