Tried almost everything and at different strengths and dwell times. Any ideas?Uploading: 39AED2F5-5B66-4982-8561-FE24F2C15C8B.jpeg…
I know the bottom is painted but was the top also? It kind of looks like the top was painted brown and some of it wore off over the years.
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Either paint or nicotine would be my guess. Try a paint stripper
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Mabey a stain was used to tint the block, a certain builder in N Florida used a lot of poor quality stain on over 500K sq ft of block buildings that looks similar to the picture. I second the stripper, a small test area will tell you if your on the right track. Good luck & follow up with whatever you find.
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FYI, straight up caustic soda makes an effective paint stripper…although it’s VERY aggressive…maybe make a 25% solution of sodium hydroxide to start with. Dwell time is 10 minutes.
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Thanks for all the replies, I believe it was painted or stained years ago when built. Will try some suggestions and post the outcome.
