I recommend ceramic coating. It does cost more initially, but less when you consider the extended life you will get from your exhaust system. I put ceramic coated exhaust on a now former girlfriends truck in 1995 and its still there today. THe truck is driven daily here in Anchorage, AK, and the city spreads de-icing agents on the roads every winter. The headers run outside of the frame, putting them directly in the spray from the from tires. A non-treated system would be quite corroded by now.

Mark in AK
87 Westy Syncro

Has anyone used a ceramic coated or powder coated exhaust system?  And does
anyone have any input on its advantages/disadvantages?  I've just rusted out
mine (lasted 4 years) and am looking for options.
Mary