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Varnish vs TSP
My boat is presently dry and unvarnished. The decks are fiberglass in need of paint. The paint manufacturer says I have to wash the decks with TSP (TriSodium Phosphate) prior to painting. My teak trim is sanded bare now. Do I wash everything now and risk raising the wood grain or do I put several coats of varnish on the wood and hope that the TSP doesn't mess up the varnish?
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