Shellac Issues

Everyone talks about how to apply shellac. Rarely do I see info on troubleshooting. What do I do regarding overlap or drips? When I sand between coats I sometimes get a gummy residue. Am I sanding too hard (220 grit by hand)?
Thanks, Raymond
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RE: Shellac Issues
First of all you should be using no more than a 3lb cut. I find the best cut is a 2 or 2 1/2lb cut. The cut is the number of pounds of shellac added to a gallon of denatured alcohol. If your cut is too thick it won't dry properly and will remain soft for a longer period of time, making it difficult to sand in between coats.

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