sometimes, that "dryness" is actually in either the primer, or the base. if so, youre stuck with it (does the color coat look rough, or just the clear?) i like to scuff my base with 800 or 1000 grit before the last coat, just to level it out. that way, you arent using your first coat of clear leveling out rough base, and i feel it gives your clear more depth.some guys will add a splash of clear hardener to their last coat of base, or use a slower base reducer to give the same result, more or less, but i dont think you can do much, short of sanding, you can do to correct dryness in the base. this is also the reason you use as slow a base reducer as you are comfortable with, to let the base flow a bit, and level itself.IF the dryness is in the clear itself, you can sand it a little more, you need to look at the coats really close, if you can see the peaks and valleys in the base, best to leave well enough alone...