There is a premium bondo that I use for big spots and Evercoat 400 for thin areas. Can't use the Evercoat for thick areas because it heard it will shrink over time and cause cracking in the paint.
At the shop they get Dynalite and putty from Wurth,but I find the yellow or cream colored putties are all about the same.I prefer the premium muds like Rage but I haven't had any problems with the cheaper Dynalite.