I got an advisory on jacking points 2 years ago, rusty.
I cleaned the areas up with a rust killer and then painted on POR15
This year it got through OK.The paint is good and stops the rust coming back. You do need PPE specially gloves as it takes a couple of weeks to get it off, once on.
https://www.frost.co.uk/how-do-i-use...eventive-paint