I started using it when it first came out around 1980.
I used to live in MN where it is humid. I've lived in AZ now for 12 years.
I have a concealed carry 1911 and the only place it gets surface rust is under the safety which is against my six pac abs.
I've never had a problem with CLP.
Only problem I ever had was when my DOG licked my steel govt model when it was laying on my side of the bed on the floor (NO KIDS). Instant BROWN oxide. I was able to get it off with the CLP immediately applied.