Glad to see Ken, you are in good hands and your wife is looking after you.

Regarding painting your wood plug, depends on the paint. Some paints require a primer to properly bond to the plug material. Main thing is a paint that will allow you to put the mold releasing agent to that is compatible with both the mold release and resin, which doesn't break down, so the resin doesn't stick to it.

Workmanship on the mold looks good, though.

You're going to have one sharp looking plane when all is said and done.