ManicMan
Member
ugh.. a while back I started on two cliff face boards which was polystyrene with plaster covering.. problem is, I didn't do too much with the polystyrene in a way and the plaster has a bit habit of cracking and falling off.. instead of just throwing it away as a bad job, I'm wondering if anyone know a .. atleast half decent way to seal it to give it a bit more strength before i get around to painting and doing other bits.