What does this orange splotch mean on my cylinders?

[ArVeeNiner]

I just hung my engine the other night and I'm getting ready to do a quick rattle can overhaul on it. It has been previously rebuilt and each cylinder has orange paint marks on them. What do they mean? Should I maintain them after I paint the engine?

Thanks

 

[KentuckyMike]

Grey or Unpainted = Standard cylinder barrels
Orange Stripe = Chrome plated cylinder barrels
Blue Stripe = Nitrite hardened cylinder barrels
Green Stripe = Steel cylinder over sized .010
Yellow Stripe = Steel cylinder over sized .020


http://www.lycoming.textron.com/support/tips-advice/key-reprints/pdfs/Key%20Maintenance.pdf

See page 9.

 

[ArVeeNiner]

My friend guessed chrome and it turns out he was right.

Thanks!

Oh, and by the way, that is a good document you sent the link to. Thanks!

 

[CESSNADON]

Cerminil cylinders are identified with a silver splotch...