I have noticed that some Bosch bikes (like SW's for example) have nice shiny engine covers whereas mine are just a drab dull black and never look clean.. are there after market covers available...
https://www.ebay.co.uk/itm/Chameleon-Mirror-Chrome-Vinyl-Car-Wrap-Film-Stunning-Premium-Finish/142777102551?_trkparms=aid=888007&algo=DISC.MBE&ao=1&asc=49138&meid=880acbebb55c4fb09d93de77a5bc5f3e&pid=100009&rk=1&rkt=1&sd=361370130327&itm=142777102551&_trksid=p2047675.c100009.m1982
https://www.ebay.co.uk/itm/Mirror-Chrome-ALL-COLOUR-0-6-Meter-x-1-52M-Vehicle-Wrap-Vinyl-Sticker-Air-Free/361370130327?_trkparms=aid=555018&algo=PL.SIM&ao=2&asc=49138&meid=a80cc5f96357424b84e0722b56a0a173&pid=100005&rk=4&rkt=12&sd=200859044884&itm=361370130327&_trksid=p2047675.c100005.m1851
https://www.ebay.co.uk/itm/4D-GLOSS-300mm-11-8in-x-1520mm-59-8in-AIR-Free-Carbon-Fibre-Vinyl-Wrap-Film/200859044884?hash=item2ec421cc14:m:m33lZrLl6mzVpD_Z6SWLWcA