Cheers guys. Not sure if its been in salt water. But I had that thought as well. The car originated from Scotland so I think that corner was open to the elements.
There is some little bits on the sill. I have knocked the hell out of the chassis. every thing else is ok. The welding I done is well more than Mr MOT guy said. Believe me if I can do this anyone can. Spent a couple of week practicing in the shed.
If your intrested The welder I bought from Amazon. Wolf 130 amp. Gas/Gasless £130 New. Well happy with it. Also got gauntlets, pack of 2 £8 and auto darkening helmet which is ace. for £40. So for less than £200 Iv'e saved myself £150 off my mate doing it. Or £450 for the garage to do. No brainer really.
If you feel like having a go. Do it. If you find you can't you will always get your money back for your gear. I found It hard to do first few days. But when I got use to it and stopped being afraid of it that's when I started enjoying it.
JUST HAVE A GO GUYS. GOOD LUCK