Yellow wood after mineral spirits?

changethursday | Posted in Finishing on September 13, 2021 08:38pm

I stripped down a bass, and was doing some sanding and went to wipe the dust with mineral spirits. Came back later to find these yellow stains…any idea whats going on??

the wide shot is pre-wipe down

Replies

pantalones868 | Sep 13, 2021 08:49pm | #1
Reaction to old finish that is still impregnated into the wood? It takes them about 15 seconds to finish a guitar these days and I have no idea what they use. Someone on a guitar forum will know.
changethursday | Sep 13, 2021 08:59pm | #2
It was a poly finish. This was a high end bass in 1982. There was a gel stain or something over the ash in this part
_mj_ | Sep 13, 2021 09:25pm | #3
Not completely stripped is my guess. Follow on with a chemical stripper a neutralize well before trying again. Good on ya for checking and not just going to a finish.
mikaol | Sep 14, 2021 07:07pm | #4
No idea what's happening. Oxalic acid may help. Last,can you work with what you have or are they aesthetically- prohibitive?
Personally, I'd try to incorporate the blotches into the new finish.