ABS seems to be easy to chrome. There are a lot of aftermarket pieces that are made that way and both the 1500 and 1800 come with chromed ABS pieces.
I couldn't figure out what plastic was used in the shelter sides or side covers. It may be doable but you'd have to know what the material is in order to have a valid question to ask a plating shop. Electrical conductivity would seem to be the key.
2006 GL1800 (Brutus Maximus)
1978 GL1000 (White Trash)"My Effort"
The White Trash Album
....Sharing some thoughts...."Venting GL1000 Rotors"
Hole templates for front and rear (45 holes) and how to use them"Side Stand Indicator Light"
For those of us who can't remember..."GL1000 RearSets"
Photos, CAD drawings and instructions (click "No Thumb" and then "Download Doc")I'd like to apologize ahead of time.