While jacking up my car i noticed a bit of paint came off exposing primer and a bit of rust a couple days later (possibly driving in the rain).

Its bugging me as I don't want it to rust anymore. I was thinking of using 1 of the following:

1. touchup paint
2. undercoating brush in a can at a local automotive
3. wurth under coating (But they don't have it in a brush, only aerosol)
http://www.goodspeedmotoring.c...tings

I don't want to use grease as it will come off when I jack up the car.

Could anyone make a suggestion or know of any other solutions?

Thanks in advance,

 

It's expensive to buy for such a small project, but that truck bed liner stuff is really tough.

 

Is that a spray? applicator in a can?

 

http://www.por15.com

Put some POR on it and there won't be rust there again. Won't come off from jacking up your car. Awsome stuff