MarkA , the few metres of chrome is as said for bumpers , mine are fglass so need to cover with a wrap and if I stuff up, there's more to try again
So on to today's epic story , while restoring the taillights. I had a monster fail but first I'll run thru what I did to restore them. As people know work these lights is the black seal shrinks and starts becoming a water trap. First job after painting the housings silver was to clean the lens and seal foam . I didn't take pics as time was running out but I simply held the rubber seal over the heat gun to soften the rubber and stretched till it cooled and done that a few times to get memory back in it for glueing back on the housing work contact adhesive. The foam seal was beyond it's sell by date so I made new ones from a sheet of high density foam and glued in position. This is them all assembled


Passenger side went in without drama after cleaning the nuts n bolts

And now the fail part,

this is a spare set I have and this is what happened, while installing the driver side the threaded rod part decided to snap inside the cast ally, easy, I'll drill and tap bigger, that didn't work so I sat back and thinked how to fix it with minimal interference to nearby parts.
I came up with grinding the whole thread boss away and making a new part from metal and bolt it in, I also Sika between the parts and welded the threaded rod to the plate which was bead rolled and some minor tweaks it was ready to bolt up once the holes drilled in the housing then tapped threads for M5 bolts.