We have a stone wall, which the previous occupants started to varnish, and
stopped. It looks awful, so we are going to sandblast the varnish off. I
reckon it won't take long to do, and we also want to sand blast some beams
we have, which again the previous owners started to varnish and stopped.
Anyone ever sandblasted wooden beams ? Any tips ?
No personal experience but as this is an abrasive process I wonder if the
treated area will look different to the untreated area in that the sand may
also remove some of the stone surface or wood under the varnish. Sounds like
a dusty process to me.
On a limestone inside wall partially varnished I used couple coats of paint
stripper, lots of rags+brushing, washed off and roughened/cleaned with brick
acid and wire brush. Varnish had been applied I suspect to try and cure a
damp problem, but just went black and mouldy under the varnish. I fixed the
damp problem, breached DPM, before stripping the varnish.
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