Black Locust exterior House Sign…

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I thought I wanted to paint the sign white and then carve in house # and street name.
I sanded the boards
Wiped them down with mineral spirits
Primed with a exterior oil primer allowed to dry 40 hours
Applied 2 coats of exterior latex paint
Both signs looked great.
I happened to scratch one and the paint all pealed off all the way down to the wood.

 The primer apparently did not adhere properly.

Does anyone have experience painting Black Locust.
If so please share your process.
I’m thinking about scrapping out the locust and using Redwood.
If I need to, any painting secrets for painting Redwood ?

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Black locust is a naturally oily wood as I’m sure you know. You may try wiping down with denatured alcohol in place of mineral spirits. A seal coat with shellac may also help.

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Both great suggestions,thank you Nick

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I hope it helps! I’ve never actually painted black locust, but that seems to work on other naturally oily woods in my experience.

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Haven’t worked with black locust, but in building some guitars I’ve worked with some other woods that had naturally high oil content. A good rub down with denatured alcohol always seemed to do the trick in getting a start on a good finish.

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Nick and Doug
You both are recommending denatured alcohol so I’ll give it a shot Today . I will update. Thank you
Dave