Bondo vs Metal to Metal

[69bananabeast]

What are the advantages and disadvantages to each one ?

[Silver R/T]

metal to metal has fiberglass in it, sands smoother.

[JimShine]

It is also water (moisture) resistant unlike Bondo.

[69bananabeast]

Jus trying to find out the best way and see what every one else experience has been  . I know that metal to metal is more exspensive.  I want to restore cars for as long as I can and I want to be able to use the best ways I can.   

[Drop Top]

Metal to Metal has Metal (aluminum) in it, not Fiberglass. Kitty Hair or Everglass has fiberglass in it. Metal to Metal has to go over bare metal. Regular plastic filler (Bondo) must go over a primer. Metal to Metal is very hard and must be knocked down with at least 36 grit. Then a sealer primer and then you work the area as usual. It is made as a lead substitute. Only use it where a heavy fill would be needed. I use it and keep a qt on hand all the time. It won't sag over time like lead will. I have been using it for over 5 years with no problems at all. Like anything else. Allways  fallow the instructions that are on the can.

[beenaround]

i agree,metal to metal has a very specific use.the idea is to use a very thin coat over a metal patch.in other words don't use it as a filler as you would use bondo!metal to metal includes the evercoat system.take the time to look it up online.