You never know, if ts done well, can last a long time.
Mine done by Platingmaster held up from 78. To 2007 and was very good, but a trip to Bonnevile (not directly on the salt ) and riding it in the winter (road chemicals) added to my poor cleaning program, and it got a few pits..
So it may still be ok, or not.
BTW back in the day,
A lot of bigger shops had chrome exchange, you walk in with your covers, they inspect, they hand over the fresh chrome bits, you pay... It was that simple..