FWIW,
quality of finish seems to depend on year of manufacture or perhaps mood of quality control dept. at the time!
a gent that knows a lot more than me (Pete, of 'Reboot guzzi spares') told me mine was a good one as '89 to '93 carbed Cali's were good because paint and chrome were better than earlier carbed or later F.I. models. Also from mid '89 they had a deeper splined clutch. some earlier ones could shred the splines apparently - (but i'm no expert on this).
To me Guzzi's are comparable to wine;
some are good years worth keeping - enjoying and savouring / some should be dumped at the end of the production line!
just my 2 cents.