my williams is going in to my local body shop soon to have the two rear arches cut out and a new plate welded in, im also having the driver side sill completly replaced with a new one instead of patching it,the its all going to be re-sealed inside and out where needed and where needed its having stone chip coating and resprayed and blended for £500.00 total.if you take the rear seats and side panels off you can sea what work is needed.