Body shop owner telling me this is rust popping up a year after he repaired the car.

[SammyChevelleTypeS3]

Any good body & paint shop knows they are wasting time fooling with painting on top of plastic bumpers or body parts unless they are prepped with special paint/adhesion ahead of primer coats. Unless one of those products are used and given a few days to cure the paint will be coming off and looking like a disaster within the very first year. The simple body prep step of sanding and then using the adhesive before a primer coat makes all the difference in a great lasting job to a total, miserable flop that the customer will be truly sorry was skipped.

 

[Ethan2]

I think for most of this kind of work, structural adhesives would be a better bet then welding.

The adhesives are weldable with a squeeze-type resistance spot welder, so you can get the best of both worlds: the adhesive prevents corrosion and provides shear strength, the spot welds provide tensile strength and allow you to have a factory-type installation. On older cars that were originally built with welds only, you also gain a lot of torsional rigidity.

GMAW/MIG/MAG is a losing proposition on repairs like this, but it’s the only option for dudes who do $1800 rust “repairs”.

 

[The Critic]

@mosaud1998 — when the repair finally fails, I have a solution for you.

https://fb.watch/xEOioHkjRL/?mibextid=wwXIfr

 

[NormanBuntz]

If it's a Chicago area car like the OP's hometown, the return of rust is no surprise. Still some of the other repairs are suspect. Hope the shop didn't charge much for the work.