So far the 3M Window Weld (08609) seems to be the better of the adhesives for this specific purpose. It is less than ideal but has worked the best of the four types of stuff Ive tried.
Clean the pads, rough them up. Clean them again and again. I used (methyl ethyl ketone) from Lowes hardware as the cleaner.
Tape of the edges where the pad meets the paint. This helps you position the pads and makes cleanup easier. The warmer the temp the easier it is to spread. Press the pads in place evenly. A few chunks of flat steel maybe 60 lbs worth placed over the pad keeps it flat and down and in about an hour they have set for the most part.
The real test will be if they are still stuck tight in a year or so.
The step covers on the fender shoulders are a different material and any good adhesive like the Goop E 6000 will work well there. Dont use the window weld stuff there as its to "thick" and will look warty in the sunlight. Dont ask me how I know that.
Maybe JC can have a fresh batch cast up with a different type of material?
