Its really hard to open up the RaceFace EXBB and clean them and grease them again. The placcy covers are a bugger to remove . I have yet to do it without breaking one. If you want to have a go I suggest warming up the BB in the oven at its lowest setting , for about 15mins so the placcy covers (they are a sort of Top hat design and run from the inside out and turn through 90 degrees to make a seal , axel interfaces with the seal ) soften then might come off without ripping. thenits a pop the seals and clean and re - greaase , then re -fit the seals.
In my vain attempt to make a SSC BB last longer I modded the BB by firstly scoring the outer face to make epoxy stick to it better, then put a tiny amount of grease on the rotating face of the dust cover. I then very carefully cut a tiny circle of polythene ( I used a Tesco bag) to stick over the greased crap cover. Finally covered the external faces with Epoxy to make a secondary overlap seal.The idea was that the epoxy went off and the bearings still span on the grease/ polythene.
First attempt i used too much epoxy and the crank arms pulled off one side, then i used a thinner amount , and so far say 100 miles over 5 rides its as smooth as the day I fitted it.