Thank you - this is all very helpful. I think the sealer might be worth a try.@Vicki C I was reading the FAQ from the manufacturer, and found this, they suggest a specific sealer and two coats, however, with the fine markings on the outside of the puck, I would be concerned about losing that detail with the sealers. Another manufacturer has this guide, and they do recommend a product for rubber made models, it might be worth a try. I have bought this brand before (from Hobby Lobby) and it did not cure because it was old (I waited too long to use it), I saw similar reviews from the amazon stock (being old), so if you do try it, it might be best to get it from the manufacturer directly and use it within 6 months.
ETA I contacted the vendor of the product I have now, brickintheyard.com who said shellac would work to seal it - I’m going to give it another go. When I have time.
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