Filler

[Big Messer]

I use Bondo or Evercoat glaze and spot putty. Sold at auto parts stores, a 4 or 5 oz tube costs less than $10 and lasts a long time. Attaches great to metal and plastic, sands easily and has excellent feathering properties. 

[Mike 1017]

12 hours ago, Big Messer said:

I use Bondo or Evercoat glaze and spot putty. Sold at auto parts stores, a 4 or 5 oz tube costs less than $10 and lasts a long time. Attaches great to metal and plastic, sands easily and has excellent feathering properties. 

👍

[rattle can man]

Some say the one part shrinks and you should use the two part. From my experience, I have some 20 yol builds with one part spot putty that have shown no sign of shrinking. So I stick with the one part.

[Ace-Garageguy]

50 minutes ago, rattle can man said:

Some say the one part shrinks and you should use the two part. From my experience, I have some 20 yol builds with one part spot putty that have shown no sign of shrinking. So I stick with the one part.

One part stuff is fine for thin fills if allowed to dry completely.

It dries by evaporation, so if it's recoated with anything with solvents, it WILL swell and then shrink again..

But you can't do heavy fills on heavy mods with it in one application.

Modelers used the one-part stuff very effectively before the two-part catalyzed fillers became widely available and accepted, and I still use one-part for pinholes and very minor imperfections.

But using one-part putty for heavy fills takes repeated thin applications to prevent excessive shrinkage and cracking.

The two-part catalyzed stuff can achieve a very heavy fill (for a model) in a single application, saving a lot of drying time and inter-coat sanding in the process.

This is not opinion. It is actual observed and repeatable fact.

 

EDIT: Don't even think about trying something like this with one-part filler

Edited 10 hours ago by Ace-Garageguy

[Mark]

The one-part is good in certain instances, like smoothing ejector pin marks.  I've got Tamiya white putty and white 3M automotive spot putty, both work for that.  

For anything where you would need to build up multiple applications of the one-part putty, just use the two-part instead.  Why wait around for multiple layers to dry?

[Big Messer]

I forgot to say that it is intended to fill scratches on final thin coats. All the scratches on the roadster's final pic are what it is intended for. One coat, dries in about 15 min and ends ready for paint.

Edited 9 hours ago by Big Messer