Two schools on that, pastor.... Some, me included, prefer to do all the filler work before spraying on the epoxy primer, others prefer doing the filler afterwards.... Not sure who's right but with the surface properly cleaned and roughed so that the filler will get good mechanical and chemical adhesion both seem to work fine. The one thing I've learned is when picking fillers, pay more attention to the quality of the product then the price. I use Evercoat products, good quality and not too bad a price but other brands are at least equal, I'm sure......

The pro body guys will be around with some input, I'm sure.....