Thanks for all your comments, glad that everyone is supportive of the work, I hope it goes as planned!
Today I started cutting out the rot, concentrating on one area rather than flitting about the place - also means that you mix up the jobs in the day rather than just doing grinding...
Picked up my repair panels this morning and was pleasantly suprised at the amount of meat on them. However I will not be using all of them, no point in removing more metal than necessary. Unfortunatly I cant get inner arches from my supplier so a fair amount of fabrication is needed...
Propped the car up on stands and pleased to see that its fitted with the billies as it should be
Decided to concentrate on the drivers side rear arch, that being the second hardest bit of work after the passenger side. Before I started..
First I wanted to remove as little of the outer as possible so that I could see what was going on behind. Need to be careful here as you dont want to take away precious inner arch and loose your reference. So cut away half way up the flared arch..

It was soon clear that the inner was a little flimsy towards the back so I removed another section of outer to get a better look, knowing I had plenty of repair panel to replace it.
I then could see all of the inner that needed replacing. Before hacking it all out, I made up some templates for the fabricated parts...
I could then get rid of all the nasty stuff, both front and rear, each time cutting sections that I knew I could fabricate and replace, hence some of the funny looking shapes...
So now I have all good, solid metal - needs to be a decent thickness too else the welder will just blow hole in it and that is really frustrating. So dress all the edges back to bare metal...
And now start cutting out shapes from the sheet metal - bloody tin snips have knackered my palms, I am sure by the end of the job I will have proper man hands...
some of the crap that has been falling out...
And now onto the fun bit... first off welded the biggest section into place, this then allowed me to draw up templates for the remaining parts.
And then made up another 3 smaller parts in order to make up the required form..
with enough left over to bend up a lip for the outer to be welded to when it finally goes on.
That was it for today, about 6 hours to do all this but got into the swing of things this afternoon so hopefully will be able to complete the fabrication and put on the outer tomorrow...
Cheers for looking!