Headboard upcycle?


My headboard has a carved design in the wood. I want to use this headboard in a guest bedroom. This particle board headboard has been exposed to moisture so the edges have raised (similar to a bubble.) I want to smooth the entire surface of the front so that I can repaint, cover with fabric or cover with wallpaper.

Can you recommend a product that I can use to create a smooth surface of this sad looking headboard? Thank you

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