Wow - that is terrifying! Everyone should have a quick look under their car while they are relaxing over Easter! And here I am worrying about some rusty nuts and bolts on mine! In terms of other jobs, you should also see how the toe-in and camber adjustment bolts are as they are bound to be seized solid if your cross-tube is anything to go by.

A year or two ago, one of the collective posted some photos of his complete rear subframe out of the car, cleaned up and painted, together with some discussion of how long it took, etc. I can't find it under the "How To" listing, but I'm sure Herman will find it in a few seconds. I'm tempted to do the same on mine as I have already taken a fair amount off just to do the camber and toe-in bolts (which I had to cut out with the angle grinder - photos to come in a while), springs out, lower arm dropped, anti-sway bar disconnected, etc. There can't be much more to undo!