Zinc Phosphate Coating - Body Filler ?

[67SingleCabGuy]

Howdy,

I'm using Eastwood's Oxisolv and so far it works great. After application it leaves a Zinc Phosphate Coating. Supposedly it provides an excellent primer adhesion coating.

My question is if anybody knows if body fillers such as USC all-metal can be applied over the Zinc Phosphate coating?

All fillers I use all say to grind down to bare metal. It is bare metal just with the zinc coating now.

Also does anybody know if I can apply Oxisolv over areas that I already put fillers on and developed flash rush which I would now like to get off easily without disturbing the filler?

I've called Eastwood and left a message on their Technical line and did not hear back yet. Also signed up for their forum but you have to wait until you are verified to post and unfortunatly I have the day off and working on it now.

Thanks

[bubblehead]

You need to strip the zinc phosphate off before applying filler.The acids can attack the filler and cause it to lift kinda like with etch primer.You could get away with minor contact on top of the filler when dealing with the flash rust but if you soak the filler where it is all feathered out you're asking for problems. If you sprayed your clean bare metal w/epoxy primer you could apply filler on top of that. Then youre not constantly fighting the surface rust.

[perrib]

Body filler manufacturers and I agree with bubblehead.

[Jamesn71]

how can you strip off the coating. Water, thinner, acetone?
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[partonkevin]

Sandpaper. And it will give tooth for the filler.