I have some info that may be of help to you. I don't have the physical issues you have, but I've purchased a respirator with interchangeable filters so that I can work with fumed silica to make an oil painting medium. The brand I have is 3M and they have a handy chart to assist with choice of the proper respirator/mask/filters for different situations: https://www.3m.com/3M/en_US/safety-.../respiratory-protection/respirator-selection/When I paint I have to wear a mask because I have multiple chemical sensitivity, but even wearing a mask after an hour the acrylic paint goes for my throat causing second stage anaphylaxis symptoms which results in a very hoarse voice. So, at the moment I'm not painting, but when I do feel like painting again I think I will have to purchase a different type of mask, something to keep the VOCs out. Even the modern low VOC and zero VOCs can still affect people with MCS.