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The Rattler · February 27, 2020, 04:09 PM

On a sample test board, I successfully wet sanded 3 coats of pure tung oil mixed with mineral spirits on a 1:1 ratio using600 grit. I then increased to 2:1 pure tung oil to mineral spirits for 2 coats with 600 grit. Finally, I successfully wet sanded a coat of 3:1.

But then I wet sanded a thick coat of pure tung oil with no mineral spirits. This also with 600 grit. I applied more pressure because I couldn’t feel it scratching the wood. This, however, caused scratches. I tried it again with pure tung oil with a very thin coat of pure tung oil applied with one finger. I purposefully applied light pressure on the sand paper. This caused even more scratching.

I suspect that either:

1. It is too difficult to wet sand using thick pure tung oil; and/or
2. One shouldn’t wet sand after the 5th or 6th coat.

All comments will be appreciated.

February 27, 2020, 04:09 PM	#8
The Rattler Senior Member Join Date: August 14, 2013 Posts: 111	Wet Sanding Pure Tung Oil On a sample test board, I successfully wet sanded 3 coats of pure tung oil mixed with mineral spirits on a 1:1 ratio using600 grit. I then increased to 2:1 pure tung oil to mineral spirits for 2 coats with 600 grit. Finally, I successfully wet sanded a coat of 3:1. But then I wet sanded a thick coat of pure tung oil with no mineral spirits. This also with 600 grit. I applied more pressure because I couldn’t feel it scratching the wood. This, however, caused scratches. I tried it again with pure tung oil with a very thin coat of pure tung oil applied with one finger. I purposefully applied light pressure on the sand paper. This caused even more scratching. I suspect that either: 1. It is too difficult to wet sand using thick pure tung oil; and/or 2. One shouldn’t wet sand after the 5th or 6th coat. All comments will be appreciated.