Shop front signs

Newbie Corner
1

I’ve got the windows to do on a shop but the guy wants his signs cleaning Aswel, what’s the best way to do this ?

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2

I suggest that you read Henry’s thread " Surface Chemistry " of 3/6 now showing above your post and watch some utube vids.
My take would be clean like any window using only dish soap and no other chemicals

3

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You can usually scrub and squeegee them, or even wfp them carefully.