what is the best 1-part glazing putty?

[fiatboy]

I have read the best 1-part glazing putty is 'Bondo'.  Any comments would be welcome.  Thanks

[Ace-Garageguy]

In my experience, the only "Bondo" product you want is the 2-part. It will fill very thick with no shrinkage.

The only place you want to use a one-part putty is on VERY THIN fills, or pinholes.

I've tried 'em all, and for my money, Tamiya white is the winner.

Edited April 1, 2019 by Ace-Garageguy

[Draggon]

Contrary to popular opinion I've found the old Testors tube putty to be the best one-part. It has to be put on in thin layers, and takes a long time to dry, but I have projects I did decades ago that are still intact and have not shrunk. I even chopped a 49 Merc in 1982 that held up until I dropped it a couple years ago and the glue joints broke. 

[Lunajammer]

For a 1-part glazing putty, I do like the Bondo product because I can thin it with lacquer thinner and use it as thick or thin as I want. The two-part Bondo is primary for filling and body work but for surfacing I sometimes thin the 1-part and brush it on as a heavy primer or for feathering body work.

[MeatMan]

Depends on what you want it for.

For most of my work I use Tamiya. I don't have issues with Testors because I haven't used it in a long time. One other gent swears by Squadron.

Bondo 1-part is good, I used it to level a top on a resin car but it was a thin coat.

For heavy filling and mods I use 2 part bondo. Bonds well, dries hard, and doesn't shrink.

[rsxse240]

I agree with the Bondo.  Although, for just getting rid of scratches and very small imperfections, I have found the Tamiya filling primer is excellent.  It is almost as thick as putty, but seems to be a much finer product.