Totally easy, just a minute or two with a hacksaw make access to the inside a piece of cake.

I'm with SurferRosa , just ride it. There's a decent chance of it going many miles without drama, and all the likely failure scenarios I can think of are slow with lots of warning.
I probably wouldn't hide it under a decal though, I'd be interested in watching it to see if a crack developes.

I can see not wanting to invest in an expensive paint job though. And maybe your lifestyle doesn't have room for a rattle-canned rat-rod in your stable, fully understandable. Just spitballin'.