Flash times will depend on humidity /temp.when using base coat ,just wait till the paint flashes,or is hand slick/meaning you can rub your hand quickly along the surface with out it feeling sticky or sticking to it.I'm sure you can see the difference between wet and dry base coat,remember your base doesn't need to be glossy when dry,a flat appearence is normal.Use base coat tack cloths between coats and wipe good,(not hard) feeling for the little nibs that can form from either static sucking lint from your clothes or just paint falling back down on the surface in little balls kinda-like hail stone form.