When I'm painting high-gloss oil-based on woodwork (architraves, skirtingboards, windows), I have been following the tin's advice and sanding between all coats. I don't resent sanding after the undercoat/primer because it helps provide a smooth finish, but the final sand often takes the paint off sharp edges, even when I am careful, which can leave them a bit dark after the final coat. Is this final sand necessary?
Is it necessary to sand before the last coat of oil paint
paintingsanding
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Best Answer
It depends ;)
I don't tend to do a final sand for the very reason you mention. However there have been times when the finish hasn't been to my liking so I have sanded - but in these cases I use the finest grade paper and sand very lightly to just take off the drips and/or dust flecks that have settled on the wood.
So if the penultimate coat is good you might be OK without sanding, but sanding does provide something for the final coat to bind to if the previous coat was applied some time ago, so ultimately it will provide a more durable finish. If you are painting the second coat as soon as the first coat is dry then you don't need to bother.