The best replacement for ceramic coating is powder coating.

The best alternatives to ceramic coating are rated as following:
★★★★★  powder coating
★★★★  exhaust wrap
★★★  heat wrap
★★★  header wrap
★★  jet hot
★★  teflon
★  thermal wrap
★  turbo blanket
  glass coating
  marble coating
  thermal coating

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Speaking about ceramic coating, one probably shouldn't forget about cast iron.

Other search terms related to ceramic coating and their ratings are:
★★★★★ cast iron
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ceramic coating
powder coating
exhaust wrap