good sanding on the primer will greatly reduce chiping. Most of the time people don't sand the primer good enough and a chip is just waiting to happen. As far as the filler goes, if you did your filler right it shouldn't chip at all unless you wack the hell out of it with a bat or something or your metal work isn't done right.

 

Body FILLER is fine,It's the glaze products that get you into trouble thinking you can build it "like" real filler. Just pay attention with your filler and save the glaze's for the pinholes.
Sprayable poly primer is another bad chipper,Keep it at a minimum around edges.

 

I don't know of any body filler that works well on door or deck lid edges. What does work is to use welding rod from a stick welder. knock off the outer layer and weld it to the edge of the door, then grind it to fit. This works great on older 30's cars that never did have good gaps. It takes some practice but when you are done it will look great.

 

Build the edge up with welding rod then back fill with fiberglass reinforced or all metal. Keep primer to a minimum by sanding most of it off on edges.

 

What he said he said...

 

use all metal or evereglass

 

IMO,It comes down to "what" your trying to do here.
Rotted out skin edges or jambs or just trying to straighten out some minor dings or such.
I have some minor imperfections to level out and I see no reason to go so drastic to weld rods or whatever on.Just a good tough filler to straighten things out after some hammer & dolly work.

 

I'm not actually trying to add to the edgesd.....just trying to flatten some small waviness on the door skin that extends to the edges. I put on new door skins and ended up with some small waviness where the new skin was folded over. Just wondered if it was more prudent to use a "reinforced" filler since I am working so close to the endges.

 

I would go with regular Rage filler. Duraglass,FiberTech or any short strand glass type filler is fine as well but with it,You will have pinholes which will need glaze over it to fill.
Your call. Use what you have and be done with it. :thumbup: