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<p>[QUOTE="Macromius, post: 4287432, member: 90772"][USER=111062]@Claudius 11[/USER] : I never soak in distilled water though there's nothing wrong with that. First I often scrub or pick off what I can. I soak in sodium sesquicarbonate in what I call half strength and full strength dilutions. Different times for different patinas. Some patinas are thicker and way more resilient than others. Sometimes I strip coins to the bare metal but I always try <i><b>not</b></i> to do that unless forced to. I want to save as much of the patina as I can. Wash. Bake in oven on piece of foil at 350 degrees to dry. ( I actually burnt a Ptolemy Tetrabol once at higher temps. Forgot it was cooking and blackened the coin!) Verdicare is <i>extremely</i> useful at this point.</p><p><br /></p><p>For really difficult problems:</p><p>I Renwax problem coins very thinly, though folks here seem very down on that. Heavy porosity can be a huge hindrance. I admit that I stooped to using lacquer once, though I don't recommend that. That coin has never broken out with BD since then, but God only knows what is going on inside the coin. It was one of those swiss-cheese Republican AE coins with a hundred little holes, each one a BD incubator.</p><p><br /></p><p>You have to practice your BD treatment skills to become confident in your own abilities.[/QUOTE]</p><p><br /></p>
[QUOTE="Macromius, post: 4287432, member: 90772"][USER=111062]@Claudius 11[/USER] : I never soak in distilled water though there's nothing wrong with that. First I often scrub or pick off what I can. I soak in sodium sesquicarbonate in what I call half strength and full strength dilutions. Different times for different patinas. Some patinas are thicker and way more resilient than others. Sometimes I strip coins to the bare metal but I always try [I][B]not[/B][/I] to do that unless forced to. I want to save as much of the patina as I can. Wash. Bake in oven on piece of foil at 350 degrees to dry. ( I actually burnt a Ptolemy Tetrabol once at higher temps. Forgot it was cooking and blackened the coin!) Verdicare is [I]extremely[/I] useful at this point. For really difficult problems: I Renwax problem coins very thinly, though folks here seem very down on that. Heavy porosity can be a huge hindrance. I admit that I stooped to using lacquer once, though I don't recommend that. That coin has never broken out with BD since then, but God only knows what is going on inside the coin. It was one of those swiss-cheese Republican AE coins with a hundred little holes, each one a BD incubator. You have to practice your BD treatment skills to become confident in your own abilities.[/QUOTE]
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