My sun visors won't stay up on their own. I have tried velcro, etc..but no glue will stick. Any ideas on how to fix it? Do I just have to get some new ones?

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My Primary Driver - '85 300CD - 4-speed conversion, 2.47 rear, lowered, euro headlights, rebuilding (not restoring so much)

Wife's - '08 Saab Sportcombi Aero

Riding a '03 Yamaha Warrior