I've recently noticed some holes appearing in the underseal paint layer whilst changing a tyre on the driveway. Is it possible to repair the holes yourself or do you need to fully respray the whole underbody chassis with underseal paint? I've just been reading this feature https://www.tiltrak.com/car-rust-proofing/ Any advice is appreciated. If repairing the underseal yourself is complex I am interested in any professional recommendations. I live 7 miles south of Swindon
Just ensure there is no loose underseal, then reapply your favourite underbody protection. I use Dinitrol 3125 on my Jag to good effect as it has creep properties, is black and seems to last but I do not use my car in the very worst of weather.
Mercedes A45 AMG
Mercedes AMG GLC43