Reply by LesB

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Posted on Boiled linseed oil and MDF?

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2075 posts in 3802 days

#1 posted 09-16-2018 04:48 PM

I can’t think of any good way to deal with the MDF other than putting a veneer of real wood on top or for about the same price you could replace the whole top with a solid wood that you can carve.

If you are stuck with the MDF top I would put two or three coats of shellac (de-waxed) on to seal it. The de-waxed is important because the waxed versions may not accept top coats very well. You may need to sand lightly after the first coat if it roughens the surface by raising some of the wood particles. They you can proceed with what ever top coat you desire. Shellac has an alcohol solvent so it evaporates and drys very quickly so move fast and don’t do any more back brushing than necessary. (clean your brushes with household ammonia and water). You can apply the second coat in about an hour and successive coats in 1/2 hour. You can make you own shellac with de-waxed shellac flakes and methanol or ethanol to desolve them to the strength you want. A 2 pound could should so the job.

-- Les B, Oregon

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