Well the plate has quite a few ridges on the face, I think maybe its been down to the rivets at some time.As I have only just aquired the car and am new to Austin 7's I am not sure what is acceptable on the pressure plate.
Hi Ken, That looks fine, but I would Skim the pressure plate.
there are a couple of things to watch
If being done in a lath you will probably need to take at least a 10th cut first up as the surface will have hardened and you need to get underthat in one go it will only be necessary to take out about 85% of the marks.
This will not have any detrimental Effect on the Plate,
And as you are rebuilding the Engine that is the way to go