How to clean Smeg cast iron griddle. Home › Forums › Public Support Forums › Help And Support › Cooker And Oven Forum › How to clean Smeg cast iron griddle. This topic has 0 replies, 1 voice, and was last updated 14 years, 4 months ago by howieleem. Viewing 1 post (of 1 total) Author Posts November 15, 2011 at 6:31 pm #66282 howieleemParticipant I have a Smeg 90cm gas range cooker and want to clean the 3 cast iron pan rests on top. If i sand blast them will it remove any protective finish from them and make them rust? Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In