What is your best metal primer for cast iron Pergola,also your best system for top coats please.Has some bad rust in few places. Any cleaning will be done manual,grinding,etc. Not so concerned about cost as the right product is more important. Regards Bobby Weir
We would recommend bare rusty surfaces be primed with Rust-Oleum 769/780 Damp-Proof Rust Primer which is left for 24 hours before overcoating with Rust-Oleum CombiColor.