Q&D (Queeks 'n Durrrty) disposables are only $2.99 at HF on sale.
The key to keeping face shield lenses unscratched is to wash them only with soapy water and dry with terrycloth towels. Compressed air works to take dust off while you're working. Use anti-static creme after washing/drying. Keep them in a dust-free cabinet when they're not OVER YOUR FACE. Forgetting to put them away is sure death for them.
Paper dust masks work better with goggles. The goggles crush the tops of 'em and keep 'em from fogging your glasses. Get the type with the exhaust valve. They're not as bad for fogging. Wally World has cheapies in the Mainstays brand which have worked well for me. Hmm, when I checked the brand, I just noticed that they're not NIOSH approved. It makes me wonder if any paper mask is. Since I seldom use them any more, it's not a big concern to me. I've gotten used to silly cones marring my facial features now.
I wear full-time glasses, too, and haven't found a single paper mask which doesn't fog the crap out of my glasses within minutes. I switched to a half-face, silicone rubber respirator decades ago and am glad I did. I swap between 2: one with N-95 dust filters (mowing, woodworking), the other with organic vapor filters (painting, stripping, pest spraying, leafblowing, crawlspace work.) I mow with a mask and muffs, but getting strange looks is much easier than putting up with several days of 5x worse hay fever symptoms each time.
I even wear my respirator when spraying rattle cans any more. All you have to do is blow your nose after a 3 minute session to realize that you should have masked-up before spraying even that little bit.
Had you actually done everything right, slivers -couldn't- have found their way into your corneas, Steve. Perhaps you should have switched to a full-face, supplied-air mask after the first time.
-- Some people hear voices. Some see invisible people. Others have no imagination whatsoever.