Thanks! yea i sprayed it with some Satin varnish before i did the water (it's in the video aswell) but that was mainly to seal all plants and get the shine off the glue. The dense foam will not absorb much of the resin water so you could get away with not varnishing it i think, Though i would advise to do it
ofc.
Make sure you use acrylic varnish and not from a spraycan, it melts the foam