Painting over dark stain/varnish

L

longdogs

Hi all

I have recently painted over some door frames/banisters etc which were previously stained or varnished mahogany. I managed to sand and removed about 98 per cent of the stain and then painted in a white undercoat/primer. I am now ready to gloss the wood in white but have noticed that some staining is showing through on the bits that were not accessable.

Would a good white gloss stop the staining or do I need to recoat first in undercoat or maybe stain stop?

Any advice appreciated

Many thanks
 
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As far as covering goes 1 or two undercoats followed by a coat of gloss should do it. Normally though its a good idea to apply a good primer sealer over previously stained timber for a couple of good reasons. Something like cover stain will promote adhesion, stop any bleeding and provide a bridging coat between stain and paint. Your case is a bit different though, because you sanded off most of the stain from a hardwood a hardwood primer is required, this is most commonly aluminium wood primer. There's little you can do about it now so you'll have to live with it, potential problems could be resinous bleeding coming through the paint and poor adhesion meaning it chips easily.
 
As far as covering goes 1 or two undercoats followed by a coat of gloss should do it. Normally though its a good idea to apply a good primer sealer over previously stained timber for a couple of good reasons. Something like cover stain will promote adhesion, stop any bleeding and provide a bridging coat between stain and paint. Your case is a bit different though, because you sanded off most of the stain from a hardwood a hardwood primer is required, this is most commonly aluminium wood primer. There's little you can do about it now so you'll have to live with it, potential problems could be resinous bleeding coming through the paint and poor adhesion meaning it chips easily.

Yeah thought as much but you say, too late now. Thanks for the reply mate.
 

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