Looks good!
They cobalts where sealed units....Not sure how the tails are on yours (could just VHT the lens).
Put into oven @ 200-225 degrees for 10 minutes (until the seal gets gooie) Then just pop off. Do your painting, and reinstall similar way. I put back into oven to heat up the goo (just a few minutes) then re-installed the front cover after applying some black rtv sealant