[Dsp Dave]

Okay first things first firberglass cowls suck I don't care what brand airplane your building all of them are full of pin holes. The first thing I do is wet sand all the parts with 400 grit sand paper. After that I wipe everything down with DX 330 wax and grease remover and then start filling the pin holes. I have tried everything known to man for filling pinholes and nothing worked good enough for me. I then came across BVM pinhole filler and it literally saves me about 4 hours of work that I used to have to do. I buy it from Bob Violet Models and its about $15.00 and works unbelievable! Put some gloves on dip your hand in and rub it into the fiberglass like you were waxing a car.Let it dry just like wax(to a white haze) and rub off with a dry paper towel. After that damping a rag with DX 330 and wipe down let dry and tack it off with a tack rag and you are ready to spray your first coat of primer