urban75 forums

I have been making a plywood "hydroponic planter" - mostly to house drainpipes with sealed ends and planting holes, but I am building in polythene-lined compost compartments too..
The thing only has to last a couple of years ...

I have various kinds of paint lying around, but randomly I "varnished" it with PVA.

Is it going to turn into a gloopy mess ?
Should I rub it down and use the ancient smooth masonry paint I have ?

I suppose if I was really serious about waterproofing plywood, I would have bought a load of epoxy ...