Dispelling Modeling Myths

[Hollywood Jim]

Here is information form the Bondo website.

They have one part putty. Bondo 907.

I use the two part putty. Bondo 801.

I think if you use one part putty of ANY kind, and you apply paint over it before it is completely dried; it will shrink.

One part putty applied in thin coats will not shrink if it is allowed to completely dry before you paint over it.

But to be safe I use 2 part putty so i don't have to worry about how thick I apply the putty.

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[Harry P.]

If it says "Professional" in the name, it's the 2-part stuff. Bondo "Professional" Glazing and Spot Putty. You have to be careful because their 1-part stuff comes in an almost identical looking package.

[sjordan2]

I would assume that the 2-part putty discussion has mostly to do with bodywork and very visible parts. I don't see a downside to using 1-part putty for things like covering seams, sink marks, etc., in engine block halves, radiators, drive shaft halves, bell housings (where appropriate) etc.

[Hollywood Jim]

I think the history of shrinking putty comes from building models in our younger years.

When I was a young boy I used to slop on the one part tube putty in thick clumps when doing body work. Then as soon as I could sand it, I would sand it. Then right after sanding it I would paint it. Just like most kids I was in a hurry to finish the model. And sure enough the putty would still be curing and a few weeks / months later it would show signs of shrinking.

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[Danno]

Late to the game . . .

Hey, Jim,

Does the 801 come with hardener in the package or do you have to buy it separately?

(See you this afternoon!)

[Harry P.]

In the package.

[Hollywood Jim]

Late to the game . . .

Hey, Jim,

Does the 801 come with hardener in the package or do you have to buy it separately?

(See you this afternoon!)

I brought it sometime more than a week ago so I don't remember..... LOL

A tube of this stuff lasts me a long lone time. A few years ago I even had to purchase some extra hardener.

Yeah, see you later today !!

.

[Danno]

In the package.

As McAuliffe and Patton said to von Luttwitz: "T'anks."