I know other people would like better protection but are put off by the costs of fresh air systems. I read another thread where someone mentioned scuba
masks. Here are some links that will maybe give others ideas to a tried and true system. I first thought Scuba a long time ago in relation to this topic, but never have researched it & discounted the idea because of oxygen tanks, but it may hold the answer. Some of the lower end items are cheaper than safety type apperati and from other posts, it appears that oxygen tanks are less expensive maybe to either purchase or rent. Silicone rubber hoods and masks are completely sealed and regulators are relatively inexpensive or quite expensive. It seems like this is a viable option:
Maybe instead of purchasing costly blast media all the time (except for aluminum or thinner parts), that money would be better spent on lower cost protective gear and cheaper blast media.