[Brushjockey]

Throw your Durhams as far as you can. I have seen many things ruined with that totally unsandable product.
Synks is ok- I prefer either Bordons wood filler ( the water reduced one) or crack shot- both easily sanded and feathered off.

 

[user1007]

If they are to be painted, I have been known to use hot mud and a nice skim coat blade. Wet sand and then prime with an enamel underlay.

 

[RinSF]

Well, I can't deny Durham's can be difficult to sand at times (I patched a spot on some crown molding, and I'll be damned if I can get it sanded down!), but I guess I also view this as a positive as it's very tough/durable...so it has its uses.

Either way, I just wanted to find something that will stay adhered to the door and not end up falling off given that doors are being opened and shut all the time and taking some abuse. I hadn't really considered using mud, but are you finding that to last well? Again, just trying to make sure whatever I go with here provides a long-term fix.

 

[chrisn]

Well, I can't deny Durham's can be difficult to sand at times (I patched a spot on some crown molding, and I'll be damned if I can get it sanded down!), but I guess I also view this as a positive as it's very tough/durable...so it has its uses.

Either way, I just wanted to find something that will stay adhered to the door and not end up falling off given that doors are being opened and shut all the time and taking some abuse. I hadn't really considered using mud, but are you finding that to last well? Again, just trying to make sure whatever I go with here provides a long-term fix.

Brush already gave you the answer and yes prime first and after, now, mud will work in a pinch, but a preferred method, no.