I have a white car and just bought some opti-seal the paint is in really good shape with little imperfections so i just put some duragloss 105 to keep a nice shine so there are a couple of coats of that right now.. i have never used a sealer like this is it ok to spray this on the car with DG105 still on there? or do i have to buy something to cut that down.. im not an expert on this at all just want a very nice shine to my car. let me know any tips