Shop front signs

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 ?

Sent from my iPhone using Window Cleaning Resource

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


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