I put down 3 thin layers of cotton t-shirts and titebond on the mirrors and let them cure for a week. They were ROCK hard. When you tapped the unsupported part of the mirror (the cutout for the OEM mirror, where there is no foam backing) you could feel the whole mirror ring.
48 hours ago I painted them with Gripper.... Now they are very, very soft. They went from feeling like fiberglass to feeling like cheap cardboard.
like I said, it is extremely noticeable because there is NO foam backing the PMF in the mirror cutout.
Has anyone else dealt with this?
I am planning on finishing them with spray truck bed coating: http://duplicolor.com/product/bed-armor-truck-bed-coating-aerosol