Best to have a forced air system (instead of a filtered mask)when shooting catalysed paints. I have a Hobby air and it works great. Keep as much skin covered as possible too. If I was painting something large (especially if not in a well ventilated paint booth), I would use sealed goggles over the eyes since the chemicals can be absorbed through the eye membrane. Yes, nasty stuff but the paint is much more durable and chemically resistant with it.