Is Plastic Filler Primer only for plastic?
I have repaired some rust on my car, and was advised to purchase some primer to apply to the bare metal and filler that I've applied. So I grabbed a tin of "Plastic Filler Primer" assuming that it is the primer to go on top of the filler, and Plastic is just the name of the ingredient of the primer itself.
But reading the instructions it dawns on me that in fact it is intended to be applied only to plastic bodywork, not metal. Is this right? If so then presumably it would not work properly if I put it on metal?
It is a bit frustrating because it does not say on the tin or this web page that it is NOT for metal, so there was nothing to alert me to my mistake. And it is Sunday afternoon and the local shop is closed and my car is sitting there all patched and ready for paint which is not forthcoming.
Please advise thanks.