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Originally Posted by kai
If you work swiftly and take care to kill any remaining acid afterwards (IMHO ammonium based solutions work more effectively than washing soda or baking powder), this is usually not a problem. If you want a bit more safety, you can use a clear lacquer (or nail polish) to fill any crevices and offer so some protection for the inlay and remove this later with organic solvents. If you decide to go this route, I'd suggest to carefully remove any lacquer from the surface as any remaining stains may interfere with the etching process.
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Sounds like excellent advice, thanks Kai. I'll see if I can give this a go at the weekend. I like the idea of lacquer, just in case. Don't want to lose the last 60% silver
