Paintwork rust converter

[Patrick1964]

We have an old Dacia Duster as a dog / tip run car and the front wheel arches are bubbling. I'm not too bothered, so was going to buy some of the stick on plastic arch trims, but I may as well rub them down first to get rid of as much of the corrosion before fitting the trims.
Is there a half decent spray or brush on rust treatment / preventer or shall I just Hammerite the edges and then slap the trims over the top ?

[Smint]

Getting as much rust off as you can makes sense, you could use rust converter then paint them, Bilt Hamber's stuff works well.

What i would do is paint marine grease all over the wheelarch which is going to be covered by the trims, inside too, marine grease is cheap enough from ebay.

[Belle427]

Flap wheel back as much loose as you can then apply something from bilt hamber or jenolite.
Hammerite is rubbish these days but will be better than nothing.