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I've recently begun spray painting and realized that I should probably buy a gas mask to protect me from harmful solvents.

I read as much as I could, but since it's not my area of expertise, I would like to ask for someone more qualified than me to see if I made the right choice.

I chose a 3M 7503L as a half mask, with a pair of 3M 06915 cartridges ^{Link in german} for protection. I was not certain if this is the right filter for the job, or if this filter is compatible with the mask.

The filter states it's suitable for spray painting, so I guess it's alright. Then again, "I guess" isn't good enough for personal safety.

Edit: The spray contians the following:

• Acetone


• Propane


• Butane


• Xylene


• Isobutane


• Propylene Glycol Monomethyl Ether


• Petroleum distillates

The 3M half mask, as long as it fits well (and you don't have a beard or other impediments) should be fine. My rough translation of the German link indicates that the filter is for organic vapors, so those are perfect for spraying. You can usually find pre-filters that go on the OV cartridges that'll slow the clogging process.

Caveat: there are probably some harmful solvents that aren't adequately covered by the OV mask. If you are using something non-typical, check with the manufacturer.

edit to reflect new information:

Beards are a problem, as a poor seal isn't protecting you. You might need to shave, or look at 'positive pressure respirator' masks.

A useful guide to various chemicals can be found on 3Ms website: respirator selection guide (Chemicals start at page 15. It's noteworthy that many of your listed chemicals cause short filter life, and propane won't be filtered by the OV unit.)