Varnish over Brightside

I am about to paint part of the hull and deck of my new built kayak, and would like to know if i can paint, sand the paint and then varnish all the boat.

Instead of painting and then taping the paint and then varnishing only the epoxy.

Will the varnish stick to the paint as on the époxy.

 I plan to use one part Brightside and Épifane varnish.

Denis