Oh he was spot on but I don't think a dual filter respirator is required unless you are messing with paint especially 2K stuff and even then you have to be sure to get the right cartridges and replace them often, a full air mask is far better for that job.
I can only speak from my own experiences but when I started the pads and shoes were mostly asbestos and very bad for your health I used to wear a respirator mask for those too but even though newer ones are supposed to be asbestos free I don't quite believe it, I am sure some of them have some although in lower amounts especially ones made in third world countries.
I like the one I linked to, it is now way as good as a respirator but plenty good enough for brake and carb cleaner and dust like filler. It is easy to breath through for a long period which a good respirator or N95 without a valve is not.
Wear nitrile gloves when working with spray cleaners and brake jobs, the stuff can permeate the skin and give you some real problems.
I got poisoned with 2K some time ago that was caused by a leak in my system and it landed me in the hospital for a week.