Reply by CharlesNeil

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Posted on Arm Seal Blotching on Chestnut

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2501 posts in 4784 days

#1 posted 02-14-2018 01:39 PM

The issue is any oil or solvent will migrate into the softer grains.
The solvents in either oil or solvent based products , react with the tannin’s in the wood and darken them.
Thus the areas where the oil migrated and became heavier, the darker it becomes and you have blotching .
This is the same reason most oil based prestains can also blotch the wood them selves .
The Arm R seal has pretty well dried by now , so sanding or if it were me I would try a chemical stripper, because the
oil will be in deep , gonna take alot of sanding to remove it , but then again you dont have the harsh, hazardous
I would sand a small section , apply 1 coat of blotch control and see what you have , ya might get by.
Chestnut will lighten over time , and amber some, as with any wood that has the word “nut” in it .
Keep us posted

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