I'm spraying (HVLP) some built in dining room cabinets with Benjamin Moore Satin Impervo (waterbourne paint). I've sprayed out some test pieces with 15% XIM extender added and the finish is smooth and flat...looks great. Here's my question: I plan to final coat with General Finishes Clear Poly. Do I sand the final coat of the Satin Impervo prior to applying the clear poly, or apply the poly over the Impervo and then sand before applying a second final coat of poly?

Thanks