Putty question

Long before Mr Surfacer, there was plain old Squadron Green putty thinned with lacquer thinner or liquid cement, thinned down to the consistency of thick paint and applied with a paintbrush. I was doing this in the 80's.

Lay down a couple of strips of masking tape either side of the seam/area to be filled to protect the surrounding area. 

I make my own putty out of Bondo red autobody filler. I have one jar with a small amount of lacquer thinner added for a thick fill of large seams and another jar with much more lacquer thinner added for filling fine lines. You can make it as thick or thin as you need for the job at hand. Dries quickly and sands easily. One large tube has lasted for years and is not too expensive. Bondo blue is also very good and works the same way. I used to use blue but cannot get it around here. If it starts to thicken in the jar, just add more lacquer thinner.

Hope that this helps.

Jim  

Aha;

 I too use all the products listed. They are great! I do a lot of NON-Competition NM aircraft with Foil Chrome.

There is also a Mr. Dissolved Putty, bit more thicker than Mr.Surfacer:

 

regards,

Jack

Could be Vallejo Plastic Putty.   I've used it.  Apply with a fine paint brush.  Wipe with a damp q-tip across the seam, & allow to dry.  For final touches, I've cleaned the remaining bit and polished the area using a MrClean Magic Eraser.

Also comes in a tube

The putty you are referring to is called Mr. Surfacer. It is a game changer. It is not for large gaps or filling voids but for fine gaps, scratches, skim coating ETC. it is awesome. It shrinks a bit so multiple applications are usually needed but that's OK. It cleans up with alcohol and is easy to sand. I started using it about two years ago and i love it.