Dtm primer question.

Another thing that I don't has been mentioned on here regarding self etching primer.
Because self etching primer has an acid in it, you must not put polyester fillers or primers over top of it.
The acid in self etching primer reacts with polyester based products and can cause grief.
Same goes with Metal Prepping steel. Do not put polyester filler or primer on metal prepped steel, unless you have sealed it first with epoxy primer.