hi just wondering if anyone else has experienced rocker panel rust with 03 corolla. mine has started showing bubbles. any advice on how to fix this. thanks.
It will have to be ground off right down to the metal and repainted. If this isn't done soon, the rust will quickly spread and eat away at various parts of the sheet metal causing very expensive to repair damage.
Rust converter is good stuff - but it only works on rust. If you apply it to bare metal - it doesn't work as there is nothing to convert. If you have rust bubbles you probably have perforation. And, as you cannot get to the inside of the panels to grind them down, rust converter slopped into the holes before repairing them may be a good idea.
If you have holes to fill be sure to dent them in a little so you have something to 'fill'.