You'll have to break the welder out, I'm afraid. As Paul says it'll not pass MOT otherwise.
Also, you'll not be able to use an adhesive good enough for the job. The structural stuff used in industry is quite 'task specific' (and pretty obnoxious to work with), curing the stuff is one of the headaches you'd face.
In most metal cars, bonding is only used in conjuction with other
fully structural joining technology, basically the car is submitted for crash approval without all the glue, just to prove that the welding/mechanicla fastening is sufficient. The glue is subsequnetly added to provide additional stiffness, not strength. Bolted interfaces are only used when the joint will have to come apart at a later stage. This provides the risk that the joint will also come apart under extreme loads, which again could have a significant impact on the way the performs under crash etc.
There are exceptions to this rule (Aston Marten, Lotus) but these cars have been designed so that the adhesive joint won't be subject to peel type loads in the event of a prang etc. Adhesives can be ludicrously strong under tension loads, but in peel they suck - big time.
Now, if you can prove equivelence, you could use rivets to do the job, as Jaguar do. But man, that's a whole 'nother story!
Cheers
8)
Eeyore
