Gluing Quarter Panels On vs. Welding

I have seen it come loose. Only place I use it is on the wheel arch. Weld rockers and trunk extensions front and rear, and window pinchwelds. I don't know of any manufacture that relies on bonding. They use a weld bond procedure and there will be spot welds through the adhesive area. I have repaired quite a few collision damaged cars where quarters have been glued on. They can come loose under urethane set glass. Cars flex and the glue doesn't. These cars also took more substantial frame damage because they just collapsed when the qtr. blew loose. ASE, I-car , and OEM repair procedures don't recommend adhesives nor do ins CO's accept it as an acceptable repair procedure. Unitized construction, the qtr. IS considered structural. Just saying. Use at your own risk.