The rubber on my '50 COE was vulcanized to a metal frame. The metal frame had small studs that protruded through holes in the fender and was held by nuts. I pondered the situation and decided that it would be impossible to attach the new rubber directly on the fender without smearing cement onto visible painted surfaces. The contours of the assembled rubber were complex to be sure. So, I bonded the new rubber to the old metal frame (after removing the old rubber) using windshield glass bonding material and after curing mounted the frame as it was originally.

The only problem I have had is the rubber sits 1/8 inch taller than originally and the door bottoms lightly brush the rubber after installation. Hopefully, you have those original metal frames. I would be interested in how others have installed the aftermarket rubber.

Kent

1937 Chevy 1/2 ton
1942 Chevy 1/2 ton
1947 Diamond T Model 509
1951 Chevy 1/2 ton
1950 Chevy COE Model 5700 ~ "Barney" ~ And more pix