I sprayed mine too ... in quick drying black car paint. Looks OK. You need to protect for overspray, and be careful not to put too much on as it runs. Mine has some run marks but they are on the bottom.

On a positive note, the empeg gets 10 times more use now, as my journey times had reduced significantly, so a big thumbs up to Mr Lord. It worked out quite expensive by the time the dock was shipped to the UK, but it makes an expensive Empeg much more useable.