|
The good thing about acrylics is that they dry fast, as long as the paint is opaque you really can paint on top and correct anything. The only circumstance where an under-layer would effect an over-layer is if the top layer is transparent.
I painted opaquely when I was using acrylics, I just remember that there were times when I was painting on dry hot days and I thought I'd loose my mind. I'd put a brushstroke down, reach for another brush full of paint from the same pile, and discover that the first brushstroke was dry and half a value step darker than the wet paint.
Sometimes I'd stop painting because I had to tend to something else, I'd come back to find that matching the dry paint was really hard because I had to mix a lighter value than what was on the canvas because if would dry darker. Of course, sometimes, I just had to repaint the whole darn thing.
Just before I gave up on acrylics I discovered a medium that extended the drying time and actually made it possible to do some blending. I imagine it's used commonly now, I don't remember it having any effect on that value nightmare.
|