Probably the wise thing to do.
if you were to pay for this work it’d probably be quite expensive , and realistically, unless done to a very high standard would only be a temporary measure. On the 8p model of which I think yours would be (61plate) the rear wishbones are a common mot failure point as they do rust quite badly. From what I can gather, 8v models are of very similar design and will probably go the same way. I make a point of power washing mine as part of the wash routine