I still have some light leaks, but that will be cured by removing the engine/light assembly which is just pushed in and spraying some grey primer on the inside of the clear blue jug. Foil tape would work too but it will be too thick to get the engine assembly back in place.
Thanks to everybody for the really encouraging comments.
If you are interested to see my project pics at a much higher resolution they can always be found on rcscifi.blogspot.com, just click on a picture there and they will pop up full screen. They can be cycled through by clicking on the thumbnails at the bottom of the screen.
Really great completion of the Film Can Space ship. Awesome web page of models you provided. Still in love with your container ship design. Thanks Mung, quite a resume.