Gel medium modeling paste?

Anyone ever use this in the place of putty? I bought a jar at an art store to give it a go. It’s very fine as opposed to something like Squadron White Putty. It dries very hard too and is easy to sand and it’s MADE for acrylic paint.

Just wanted to get some feedback.

This is what I am using:

http://www.dickblick.com/products/liquitex-modeling-pastes/

I’ve seen that at Hobby Lobby but didnt want to spend $12 on an experiment.

I’d be interested on how well it works.

Liquitex had several other products similar to that one. Reading the diections they all pretty much sounded like they do the same thing.[:|]