At least the patch was sheet steel - not a 1-gallon Duckham's can that had been jumped on to flatten it, which I found as the new footwell in my father's Mk. 1 Escort.
if you are dont cut the patch out yet,go get some thick carboard (ceral box type) place over the top of the wing and mark the shape out that you need to repair, then cut the template out a least two inches bigger and transfer to sheet steel, once thats done cut out the sheet steel and place on the wing and tack weld on the edge of the wing lip where the bonnet shuts. now carefully pull the steel down tacking every so often, this way it should follow the wing shape mark the outside edges of the template steel on the wing cut the tack welds and with luck you be left with a nice repair panel.
if you fold an edge on the steel it might make it easier from the start
I was going to shape a tongue-shaped piece of steel and try my new joggler/punch toy, then 'spot weld' and lead load. As you can see I had a little play with it down the one edge.
your better off jogging the repair piece than the wing as the shape of the wing will end up distorted. also make the repair big enogh to get rid of all the rust easier to weld up
It makes sense joggling the patch, I often miss the 'bleeding obvious'! I'm deffo going to cut back all the cruddy stuff before I start patching.
I assume that spot-welds (mig) every inch or so will suffice? Along with the lead-loading surely it has to be an improvement on previous repair which was randomly snot-welded?
To be honest - I would have scrapped the whole wing and replaced it as the wheel arch looks like it needs doing too.
Have you fully investigated what is under that wing? Is there corrosion you can't see? There is no point repairing the outer wing if it's going to keep rusting from the inside out.
Throwing 1400 quid at someone for a new wing is not an option and I do like a challenge. On the whole the wing is ok 'cept for the indicator surround, front skirt and wheelarch. These 3 repair panels can be got for about 200 quid.