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Before varnishing I apply a coat of gloss medium. It is called the isolation coat.

It isolates the painting from the varnishes and gives cleaners and restorers an insoluble and clean place to scrub down to.

The isolation coat is composed of 2/3 gloss medium, 1/3 distilled water, and about 12 drops of defoaming oil. Care must be taken not to use too much defoamer because it can repel acrylic and prevent good adhesion.

I use a brush to apply the isolation coats.

I apply clear coats until the surface has an even gloss.

I use a hair dryer to dry the acrylic coats. Before acrylic and electricity, oil varnish coats were allowed to air dry. It took a day or more to apply one coat. With acrylic it is possible to apply hundreds of coats in a day.

Dry to touch is not cured. It takes several days for acrylic to cure. The curing process is described as: time required for all of the water and solvent (used as freeze-thaw stabilizer and coalescent) to evaporate and leave the film surface.

New Blood #2 was more complicated. I applied a frisket and cut out the portions I wished to be matt and left the portions I wanted to be gloss covered.

I used my spray gun to apply the isolation coat so that the acrylic would not seep under the frisket.

two days later...

I turned on the vent fan, opened all the windows, and turned off my computer.

Thunder, the cat, took off when the compressor began thumping. I sprayed several coats of removable matt varnish on each of seven painted panels.

Paint sprayers and airbrushes require a lot of care and maintenance. Cleaning them properly is essential.
 
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