How to remove mould from plywood before staining

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How to remove mould from plywood before staining

Postby edgeau » Thu Jan 05, 2017 2:43 am

Hi all. I bought 12mm marine ply for my walls before Xmas. But did not stain / treat it immediately. It has now got some mould growing on it. I tried some fine sand paper but that has not removed it. Any ideas how to get rid of it before I stain and seal?

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Re: How to remove mould from plywood before staining

Postby noseoil » Thu Jan 05, 2017 8:36 am

Maybe bleach or oxalic acid?
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Re: How to remove mould from plywood before staining

Postby Tom Horn » Thu Jan 05, 2017 11:34 am

When building my folks log house we used a solution of 50/50 bleach and water to remove it from the logs before staining. It should work on the plywood but haven't ever tried it on plywood before though.
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Re: How to remove mould from plywood before staining

Postby KCStudly » Thu Jan 05, 2017 4:03 pm

Maybe TSP (tri-sodium phosphate)? This and/or bleach will kill the mold, and might whiten the wood in the treated area slightly, but may also not completely remove the darker colored remains.
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Re: How to remove mould from plywood before staining

Postby QueticoBill » Thu Jan 05, 2017 4:42 pm

Most of the remedies I've seen go to bleach and detergent and scrubbing, and all recommend proper protection - goggles, gloves, at least a dust mask. Here is one that is very appropriate, dealing with stored material: http://www.ehow.com/how_6541524_removin ... ywood.html
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Re: How to remove mould from plywood before staining

Postby edgeau » Fri Jan 06, 2017 5:40 am

Thanks all. The diluted bleach, a scrubbing brush and more sanding did the trick. For some reason after the bleach the surface was really rough hence more sanding which also got the remaining stain out.

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