I used it on the outside of my transom on my 23 Tsunami with very good results.I rolled it on (two coats).
I finished up with a few coats of two part urethane above the waterline,and a hard ablative below the waterline.
It's been over four years now, no problems at all.It left a perfect surface for the top coat of urethane,that I sprayed on over it.
I sanded it with 220 before i applied the finish coats over it.
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All this,just for a boat ride
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