I picked up these Jensen Interceptor valve covers in 2006. I always thought they were one of the nicest looking B/RB valve covers and they match the air cleaner lid on my Windsor pretty well. Their relative rarity adds to the cool factor as well.
But if I had known then what a lousy casting they are and how much work it would be to get the look I wanted, I may not have bothered.
To make a long story short, I puttered around with cleaning and polishing them occasionally until 2011. Then they sat in a box unfinished for 9 years. I just got them out again and finished polishing them to a level I'm happy with. Today I picked up some extra long 1/4-20 bolts to attach them to the heads, so hopefully they'll be on my Windsor by this weekend.
2006: as received
2008: powdercoat mostly stripped off and some clean-up with an electric palm sander
As far as I got with them in 2011
All done polishing, and showing off the matching breather I bought from 440 Source
Painted, new rubber grommets, ready to install