For collision work what would be best for plastic front bumpers? From the advice I have read on the forum epoxy appears to be a better option than regular 2k sealer for chip resistance and durability. I do this on the side so I am not putting out multiple cars per day. Actually most times I am only working 3 to 4 hours per day. So with my limited time each day I am wondering if it would be better for me to spray epoxy mixed normal and then sand next day and paint (this would get a chemical bond plus the addition bond with sanding) or would it be just as good to sprayed reduced and wait 30 minutes or so and then paint? What are you guys seeing as works best?