- Flow improver — roughly 95% water and 5% glycerine. Use instead of straight water for thinning your paints. Or better yet:
- Thinner — water 66%, isopropynol 33%, and then just a few drops of glycerine.
- Retardant — maybe 5% water, then add half and half of the remaining volume in glycerine and glycol. Apparently you can just use straight glycerine, but the addition of glycol really slows down the drying time for acrylics for blending and what-not.
Info courtesy of Luke's Aps on Youtube. Lots of stuff there about saving cash on terrain-building and what-not.