I put on my bottom 4 coats of
epoxy, the first one or two coats being thickened
epoxy. I did get some ruff spots using the thicken
epoxy. This happened when I first started using the foam roller with the thicken
epoxy. I ended up using 50 grit sandpaper on a belt sander and used 9 belts to knock down the high spots. So I will say that the mas
epoxy is very hard. The bottom prior to painting looked like a sheet of glass. I also
epoxy coated my rudder.