Grease or oil from bondo work ?

fiber glass and bondo are 2 different things but ive done a little work here and there ok so check it out get a bondo kit it comes with a big can of bondo then a little tube of hardner then some sand paper primer and stuff like that sand down the area u need bondo-ed then put something behind the hole and then put bondo on it i mean slather this hole man then sand the bondo down and make it smooth and flush with the car then prime it and there u go buddy primed and preped for paint