General Finishes Enduro-Var Water-based Top Coat for Wood (Various finishes)
Enduro-Var is a self cross-linking polyurethane that looks more like an oil varnish than a water-based finish so is wonderful for enhancing but also protecting wood. It is highly water resistant and highly resilient to wear and tear once fully cured. It is both sprayable and brushable.
General Finishes Enduro-VAR is water-based, but it imparts a warm amber tone and brings out grain definition as a traditional oil-based varnish would on woods. That means it WILL put a golden cast on any light surfaces. (If you are looking for non-yellowing top coats try High Performance)
Enduro-Var adheres well over wood dyes and stains and raw wood. I use it to seal my designs painted with Fusion on wood with lovely results but if you are using a different paint it is best to test them out together on a sample board first.