OK then, I'll throw in another option - Polished stainless allen heads. Thats the set I'll use when I put my project engine together. I have "black" allen heads on my side engine covers. Very minimal rust that a little oil takes care of. Sure makes it easy to take off and put back on. Haven't stripped a allen head head yet but I did strip threads in the case in which case I learned how easy it is to install a heli coil.