To all: I am new to OCing. I have CC for years. I was coming home from work late (11pm). Stopped at I-95 and 21 Enmark for gas. Port Wentworth police was inside talking to employees. I got the courage to OC inside to make small purchase. Police was eyeing me the instant I walked in. I made my purchase and walked out. Police office followed me and asked if I was LEO. I told him no. He asked if I had CC license. I told him yes and gave it to him. He proceeded to tell me it was not legal to OC carry into a store. I told him to read back of license and told him what the laws of CC and OC are (not word for word). After reading back of license and determining I was not a threat he let me go. We shook hands and I left.
Well it could be useful to have handy to refer to but don't expect that they will accept your copies or that it change what could happen. I have been in a situation where we tried to present some documentation to LEOs and they were not receptive to the act. See the Tonys incident in Manassas.
There are a lot of threads on here about people's experiences with the police. They provide great insight into handling an encounter and what may/may not happen. If you take some time to look through the older threads you'll probably find it well worth it.