Re: how to make a capped nut...(acorn style)
I was just being facetious about the bondo. But, have you tried using stainless rod and a stainless nut? A few seconds on a bench buffer and your homemade acorns will look great. They'll Never rust and because the fastener is not a critical structural item, stainless will work well.
Age and Treachery Will Always Triumph
Over Youth and Skill & "Charlie Don't Ride"