If I turn the glide bolts down any further, the key tops rub on the bottom of the fallboard and have already begun to scrape the felt away.
BDB, Ed and Gene have already given you some great advice, but the above statement stood out for me, and I'd want to back up and address the keybedding first off as it sounds as if this may have been dramatically altered. I strongly recommend the "Worldwide Technical Reference Guide" available from Steinway in NY, which lays out exactly how this can be done very quickly, without the need to remove any keys (yes BDB, I learned that way too!). Among a great many other things, the Guide also completely demystifies NY Steinway sostenuto adjustment, for which reason alone it belongs in every tech's library!
After that, a piano that old would really benefit from a complete overhaul of the pedal box and trapwork assembly with new leather/felt and parts. Check the lyre post joints carefully and disassemble and reglue as necessary. Check that the trap lever mounting screws are tight and the trap pivot pins inspected and lightly lubricated (I use a dab of Superlube synthetic grease from Pianotek Supply for this). Although you already tried dry lube on the keybed, you might again consider backing up and lightly sanding the keybed to remove any irregularities and previously applied lubricants, and then reapply a light teflon spray. I've seen waxes used which can cause the keyframe to chatter as it slides.