Etch primer over filler and paint

[Elkie885]

I've fitted in some new panels to my camper and removed all the black protective coat from them so they are bare metal. I have some etch primer ready to go but at the edges of the new panels I have filler to level out the joins and beyond that is the old paint, will etch primer damage or eat into the old paint or the filler.
Thanks.

 

[brightspark]

I've fitted in some new panels to my camper and removed all the black protective coat from them so they are bare metal. I have some etch primer ready to go but at the edges of the new panels I have filler to level out the joins and beyond that is the old paint, will etch primer damage or eat into the old paint or the filler.
Thanks.

etch goes over celly and 2k no bother and the filler

 

[langy]

Epoxy would be better, you can get 1k as well as 2k.

I've fitted in some new panels to my camper and removed all the black protective coat from them so they are bare metal. I have some etch primer ready to go but at the edges of the new panels I have filler to level out the joins and beyond that is the old paint, will etch primer damage or eat into the old paint or the filler.
Thanks.

 

[medlar]

do you know that after you have sprayed a coat of etch primer you DO NOT rub it down, you put a couple of coats of normal primer on then flat the primer being careful not to go through to the etch

 

[Elkie885]

do you know that after you have sprayed a coat of etch primer you DO NOT rub it down, you put a couple of coats of normal primer on then flat the primer being careful not to go through to the etch

What if you get runs in the etch primer, I guess its sand it off and re etch

 

[gaz_moose]

you only want a light coat of etch primer.