JayDrummond--Do you use the .45 ACP in spray or foam??
Thanks to all for the advice. Based on responses here, I have ordered some in spray form. The OC was originally recommended by an LEO tactical officer. He said that there are a few people who are relatively immune to other chemical sprays, such as mace, and some people are able to shut out much of the pain of pepper spray, but that it has been well established that no one is immune to the OC effect of eyes swelling shut. He uses foam, but based on responses here, I think the spray may be better suited for general civilian use.