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waterproof an outdoor lettered sign

I recently was gifted a session at a Board and Brush establishment, and made a lettered sign which I wish to hang on the garden fence. I would like to preserve it with a waterproof topcoat. Suggestions for product? The board was stained first, then painted, then lettered. I don’t want the waterproofing product to alter the result. Thanks for assistance!

The lettering is flat, no 3D. I wonder if spar varnish would be a good option. Am a little leary of chemicals/health issues with auto clear (that I read in some other forum).

Woodworking Asked by SME on July 25, 2020

2 Answers

2 Answers

Ive had good luck with this: Genereal Finishes Outdoor Oil

But your results will vary, depending on regional climate.

Answered by Atcfurnitureservice on July 25, 2020

If you want it to be bullet proof, surfboard epoxy will definitely waterproof it, and it will last for many many years. I've epoxied a 14 foot mahogany wood boat. You have to work in small batches, as the larger the batch the faster the cure, but its neat stuff. I used System 3 when I did my boat.

Answered by Paul Davis on July 25, 2020

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