Trying to teach myself a new skill and so far, as you can see from the attached photos, it's been an unmitigated disaster.
The pictures show an attempt to spray zinnser amber shellac, diluted 1:2 with alcohol, and tinted with transtint dark walnut. The substrate is Baltic Birch. Equipment is just a regular old siphon fed spray gun off a regular old compressor - no HVLP setup. Pressure was 40psi at the regulator about 25 feet of 3/8 hose away from the gun. No dryers or filters installed.
The defects are not bubbles. Rather they are holes in the finish coat. Is this the result of water in the lines? I don't believe there's any contamination on the surface but I won't bet the rent money on it. The surface had just been wiped clean (using denatured alcohol) of a previous brushed coat of the same tinted shellac which didn't display the effect shown.
All comments welcome as long as you recognize this is my first attempt at spraying shellac and is a learning exercise for me.
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