Phil - removing two-pack or epoxy from a thin ply deck can be a pain. If you are sanding with an aggressive grit (60/80) then you have to be really careful not to go across the grain as this, as I'm sure you know, will show up when you re-varnish. This can happen even with a random orbital sander.
It's also very easy to sand through the top veneer and that will not look at all pretty when the deck is re-finished.
Try a hot air gun and a really sharp scraper to see if it will lift off that way. If not try something like 'Nitromors' - the one in the yellow tin that you neutralise with white spirit. Again you'll need a very sharp scraper and be prepared for multiple applications, depending on how well the finish has been applied.
As for the hull - are you removing the paint or just prep'ing the surface for a new coat? You don't say what finish you plan to apply. Just remember that you can apply one pot over two pot paint finishes but not the reverse.
Depending on the condition of the old paintwork you generally need to give the whole hull a good sanding to give a key for the new coating (80/120 grit), then fill, sand and prime any surface repairs necessary; then undercoat, nib off and apply top-coat following paint manufacturers instructions.
The entry about polyurethane paints below the waterline really only applies to hulls permanently immersed - one or two-pot polyurethanes are fine for dinghy hulls which tend to spend most of their lives out of the water.
Good luck with the refurb
Tim
It's also very easy to sand through the top veneer and that will not look at all pretty when the deck is re-finished.
Try a hot air gun and a really sharp scraper to see if it will lift off that way. If not try something like 'Nitromors' - the one in the yellow tin that you neutralise with white spirit. Again you'll need a very sharp scraper and be prepared for multiple applications, depending on how well the finish has been applied.
As for the hull - are you removing the paint or just prep'ing the surface for a new coat? You don't say what finish you plan to apply. Just remember that you can apply one pot over two pot paint finishes but not the reverse.
Depending on the condition of the old paintwork you generally need to give the whole hull a good sanding to give a key for the new coating (80/120 grit), then fill, sand and prime any surface repairs necessary; then undercoat, nib off and apply top-coat following paint manufacturers instructions.
The entry about polyurethane paints below the waterline really only applies to hulls permanently immersed - one or two-pot polyurethanes are fine for dinghy hulls which tend to spend most of their lives out of the water.
Good luck with the refurb
Tim
