Don,
Some say yes, some say no.
I feel that they are they are there for a reason, to spread the bead to
assist in locking the rubber to the glass and surrounding metal.
I replaced mine with new.
No leaks, looks good.
This has been an on going subject, of accute impasse, on the list for
some time.
I would recommend replacing them if you don't like the dull chrome, or
leave them, and just paint them black.

Later,

  ______________
 |[  ] [  ] [ ]\
 |    |    |    |
||-(())----(())-|

Terry 85 GL