I'm still prepping my 67 Chevelle for paint but am wondering whether I should seal it or not. I have epoxied, slick sanded and SPI regular build urethane primer on it now. The slicksand and urethane have both sat in the sun for days and I'm to the point of 600 and shoot. I generally follow the perfect paint job but with less than perfect paint conditions (homemade PCV paint booth inside garage) I feel the epoxy sealer step is just one more chance to get dirt and texture into the paint. I hate dieback but with making sure the primer sits in the sun and using hardener in the base I'm wondering if the sealer is really necessary? I also plan to let the base dry overnight before Universal. Paint booth pics attached and yes that's my 70 not the 67. Thoughts?