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Tongue & Groove Pine

16 years ago

We built our sunroom about 19 years ago. The walls are tongue and groove pine.

At that time, I put on one coat of finish. I do not remember what it was, but know that it was oil-base and it was a flat finish. I believe it was a Pratt & Lambert product. I have not seen that brand around here in a long time, and the store where I bought it no longer exists.

I believe I need to seal this again - or do I???

I can see areas particularly on the window sills where it appears to be bare wood.

I also have a few areas where there are water stains, plants spilling over.

I know that the wood has aged, i.e., yellowed, so sanding is probably not a good idea.

My questions ---

Should I apply another finish to protect the wood?? I would want a matte finish, so it looks like wood and has no shine.

If so, how should I prepare the wood?

If so, what products would you recommend?

Thank you in advance for your time and suggestions.

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