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sore thumb 06-18-2013 07:36 PM

Graying Cedar
 
Will a semi-transparent stain look like the sample when applied to graying or gray cedar? Should any special treatment be applied to the graying/gray cedar before applying the semi-transparent stain to boost the stains color?

Jmayspaint 06-18-2013 07:49 PM

Oxalic acid based wood brighteners work especially well on graying cedar. It can really make it look new. Helps if you can do a strong hose rinse or light pressure wash after applying.
The Benjamin Moore brand brightener is my favorite, But There are lots of different brands of brightener that work well.

Gymschu 06-18-2013 08:27 PM

No. The gray represents dirt, algae, mildew, mold, etc. that has grown on the surface over the years. Some like that gray look. If you put stain over all that dirt, etc. it's going to be one ugly mess. If you are seeking the cedar color, you MUST clean as Jmayspaint suggested, allow the cedar to dry, then apply your stain.

housepaintingny 06-18-2013 08:47 PM

Clean first using a sodium percarbonate based wood cleaner, nylon scrub brush and low pressure. After cleaning you can then apply oxalic acid, citric acid or a blend of both to brighten.

user1007 06-19-2013 07:05 AM

Quote:

Originally Posted by housepaintingny (Post 1203651)
Clean first using a sodium percarbonate based wood cleaner, nylon scrub brush and low pressure. After cleaning you can then apply oxalic acid, citric acid or a blend of both to brighten.

Yup. You do not want to use either a basic or acid reaction to clean the cedar without neutralizing its reaction with the other. Water on its own may not be enough to fully stop the chemical reaction on its own.

A real paint store will have a conditioning system that will work nicely.

Even with the cedar cleaned and brightened you should test the semi-transparent stain to make sure it is going to give you the color you want.


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