June 11, 20188 yr About Shellac: Three Pros: + barrier for wax, silicone, odor, resins, water vapor. Seals those things in well. + fast drying. Usually dries in 30 minutes, less for spraying + easy to repair. Just add some more and it will melt in. Three Cons: - gloss only, but can be rubbed to lower glosses - susceptible to alkali, water. Being acidic, it does not do well with things like ammonia in Windex. - shelf life limited. Starts to degrade in as little as one year.
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