don't forget bleed thru. If you block on an existing paint and you had to go thru a layer or two a sealer is great at keeping things separated as to not create halos or rings or an edge sucking up the shine. If it does lift I'd rather be sanding on that and reseal lightly than trying to do it with base. Sealer is great insurance for a number of things
Last edited by tech69; 12-27-2012 at 07:57 PM.