Exterior wood polyurethane

John Keith asked 4 years ago

These are a pair of paneled unpainted garage doors that I can’t get a nice finish to stick. Brutal sun shrinks and cracks and peels the Minwax Helmsman Spar Urethane. The wood had been stripped and sanded before application and was peeling back within two seasons. I’m ready to paint the buggers! Any ideas?

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