With 3 coats of clear on already,your better off to resand and clear.
Problem will be too much build and you'll end up with urethane wave.
Anytime you do seperate clear sessions,it's always recommended to flatten out the first job as there will be variances in thickness as well as o'peel.
If you just scuff it,yeah,it will stick fine but your building another coat of "plastic" and the variances will start to distort the "clairity" of your finished cover of the base.
Nice work for your first go and get some light on that off side because the second round of clear will go a lot slicker and also more likely to run on ya.
You could be picking up more trash than necessary from the plastic masking.
Base has a tendancy to flake off when you come back with the clear.
Also,Use some Tyveck coveralls or such,Spraying in "street clothes" is about the worst thing you can shoot in as the fibers are constantly coming loose and ending up on the job. Then there is the heater.Make sure you use deicent filters in it too. Trash IS controllable,Just takes some attention to the "little things" and thought about the AIR going in,out,and around.
Last edited by Bee4Me; 10-25-2009 at 04:47 PM.