ABS Light & ruined pick up rings!!

My issue is with the corroded backing plate which the abs sensor fits to. this damaging by ABS rings!. just ordered the new plates and they have arrived today. has anyone fitted these & did they use any adhesive/bond for the plates?

Ive ordered some new rings as well. Can anyone tell me what specifically did you use to get the old rings off and what technique. thought id ask before i go through a few fingers & throw tools about!

cheers, Dave.