[jroach]

i am planning on using under coating on the inside of my fendersto try and prevent them from rusting should i prime the fenders first? these are goodmark replacement fenders so they already have sealer on them

 

[Dan Schoenecker]

If they are already primered, more paint isn't going to do much if you plan on applying undercoating. Just make sure you get good coverage when spraying the undercoat.

 

[Steptoe]

I use tyre black...
just hose off most of the dirt and paint
Dont go out in the rain for a couple days thu.
Cool if the wells get real dirty, a water blaster will remove the tyre black.
I dont use tyre black on tyres...regular use of jaye pine disinfectant is best.
I say regular, 1 or 3 coats does very little..as time goes on they look very natural.