Originally Posted by Bear907
A buddy of mine that does a lot of custom auto body work said he recommends bare metal to bare metal bonding when using stuff like JB weld. It would probably bond to the powder coat but not as strong as metal to metal would. He also recommended a 3M solution that would be easier then messing with mixing jb weld or something similar.https://www.youtube.com/watch?v=4buSuzQKaUI
I'll pick some up and do some test runs this weekend.
3M VHB is an excellent solution for face to face bonds, such as the lap joint in the linked video, that is second only to actual welding, including solvent welding certain plastics. The thinner the tape, the more rigid the bond. Just stay away from the 6 mil tape. The 6 mil tape stuff is pure adhesive—it sticks and holds like nothing I've ever seen— but it's very soft and malleable because there is no carrier, unlike the thicker tapes, and it doesn't stick well enough to the backing strip, making it darned near impossible to apply where you want it. The thicker tapes have a foam plastic carrier in various colors (it doesn't look like foam) that make the tape much easier to handle and apply.
A less expensive solution that is almost as good as the VHB series is the 3M bonding tapes, such as the 4010. The latter is popular with modders for mounting custom windows in computer side panels. It works best when larger surface areas are being bonded.