Peoples Thoughts please

[slowhand99]

I used to use old engine oil. Then I realised I could use new engine oil. Much nicer and less carcinogenic.

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[goldengooner]

I'm not a fan of underseal. It's arguable if it actually achieves anything. Spraying all that crap under the car makes a bloody mess and looks horrible. In the 1970's/80's I used to do bodywork and spraying. It seemed to me that undersealed cars went just as rusty as those that weren't, possibly more so. Cars go rusty from the inside out, not the other way around. As often as not I found the underseal was holding the rust up. So no, not for me.

I believe the best way to protect your car is to seal from the inside using Waxoil or something similar. I used to use old engine oil and a garden spray inside door panels and chassis sections etc. It works well. You've just got to park your car somewhere you can let it drip. Cars are built better nowadays anyway.

No Mess, its like rubber, things just bounce off of it
It's what Mike at Modurstang use,
https://www.ebay.co.uk/itm/UPOL-RAP...y-On-Coating-Underseal-Tintable-/331663730292