flow improver = flowaid = flow...?
I think the real question is what are you trying to do? Are you adding something to your acrylics to
1. slow the drying process so you can \'wet blend\', or are you
2. using these things to act as another medium which you add paint to, in order to improve it\'s characteristics for your painting style, or are you
3. Adding a \'whetting agent\' to the paint in order to have thinned paints \'lay flat\' into crevaces... i.e. improved washing, shading or tinting?
There are a variety of mediums you can use, but if you are using either extenders or flow enhancers (i.e. whetting agents, i.e. detergents/soaps/non-water based solvents, etc.) then you have a bunch of options.
If it is the later, both golden and liquitex make a flow enhancer, and both are fine. However, goldens is much \'thicker\', while the liquitex is already diluted. There are others from folk art, but they are very dilute, so they are much cheaper. But, you will use more of them.
If it is something to improve the \'flow\' of the paint, you can still use these things, but just not as much.
You can also use other combinations of other fluids, such as windshield washer fluid (for instance) to do the same/similar thing. Check out many actual modeling and model railroading sites. You will find many techniques for this sort of thing.
Hope this helps!
