The cpes is the thinnest of the epoxies i know of, the boat epoxies are a little heavier but heating before mixing may help.
The inside coating is the reason for using thin as it works itself down the thru hole and belly holes. you can use a foam brush to take off the excess dripping and coat the outside. Use a pipe cleaner soaked in epoxy to run thru the holes to be sure the inside is covered.
You can put stainless steel screws on an angle over your bench and hang the belly holes of the plug on them to dry.
If you have a gallon of the boat epoxy it would sure be worth a try as a clear coat.
Hopes this helps.
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