Hi buddy.
I dont have any dismantled pics but i do have pics of fully restored ones that i have done for my customers with new springs / blocks / bushes / gasket etc.
The black covers are painted with a special plastic paint called Inotec. Its used for dashboard & trim repairs.
Its best to press the supporting bar bush out but the nylon sleeve will be fine. Well it is in my solution anyway.
Pics below.
Hope this helps.
CheeRS
Chris @ PRP