Exhaust holes - repairable?

[yamahonkawazuki]

I have a few holes in the can from where the things corroded through. The worst ones down by the bracket and its spraying soot all over my disc, the other is covering the heel plate and my foot, but not as bad. Possible to weld it up? Using MIG welding that is, can get it done free that way! Just worried about them getting any bigger, and my engine getting shot from it.

On a better note, looking to get a full system exhaust at some point, what is available in the UK (if anyone knows) and whats the best thing to go for?

aye ive used MIG on my gsxr flange and exhaust conversion on my gs. works great so far. anyhoo m8 take care