Hi, CL,
and, at least tome a very interesting one as well.
I can't speak specifically for PP here as the last time I visited the case restoration dep. issome years ago.
I'm planning on doing some more in depth work on restoration, incl. case work - but
Laser welding is widely used nowadays and not nly for case restoring - even movements show clear evidence of this new technique.
You'd be surprised aboutwhat is possible in case refinishing - also how tiny the amount ofmaterial actually is which needs to be "removed" to make a previously prominent scratch completely invisible.
Generally it's not easy to work on the scratch area only - in order not to change the overall shape and not to create a "wobbly" surface the whole "plane" must be worked.
The worstcase always are those "quick and dirty" buffing jobs -this will ruin theoverall shape, sharp transitions change into rounded, poorly defined angles..... this often means a multitude of work for a proper refinising afterwards.Sometimes it's almost lost.
I'll try to do some before and after pictures later.
Best regards
Suitbert