I had a little left in the can and wanted to get some value out of it so I popped off my 4 year old side markers that were showing just a little touch of yellow on the tops:
https://uploads.tapatalk-cdn.com/202...5dbbcfdd02.jpg
Hit em with the scotch brite:
https://uploads.tapatalk-cdn.com/202...b2c9853155.jpg
Then cleart:
https://uploads.tapatalk-cdn.com/202...d7b519d24e.jpg
Necessary? No. But that heavy clear probably bought me another 5 years before needing to replace these again.