How To Seal Vintage Metal Containers for Outside Use?

Good Questions

Q: I have had this ice cream maker sitting on the attic steps for a couple of years. Too big to sell online. No room to display it. But I love the graphics on the outer part. And now that I took it apart, the inside is sweet, too! I am wondering if any of you crafty geniuses out there would know a good way to seal this for outside use to keep the graphics crisp. Would acrylic spray do the job? Deck sealer? I looked around online and didn't find much advice and nothing I really trusted.

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