Hi Stempy, donot be so pessimistic!

I've just renewed all of the joints on the front of our Xantia estate and that is ten years old. Not a single sign of corrosion, so unless your car has been alternatley dipped in brine and dried in warm moist air,

, corrosion will be minimal, if at all.
Unless your car is the wrong colour.
Newer Citroens only rot slowly.
What do you need the angle grinder for? You're not going to cut up the car, are you?
Handyman,
