Washing duck eggs

[Kansaseq]

My duck insists on laying her eggs in a muddy depression on the ground,and as a result, her eggs are always dirty. I wash them, but can never quite get rid of all of the stains. I want to sell them, and worry that the staining might be a turn off to customers. Will commercial egg-wash remove these stains? What has your experience been with selling duck eggs to customers? Do they mind the staining? My duck eggs are green and don't show a lot of the staining, but I still worry.
Also, do any of you 're-seal' your eggs after washing? I read that commercial egg growers use mineral oil to reseal the eggs after washing, to help keep them fresh. Does anyone do this at home? Thanks for your input.

 

[pringle]

Duck eggs already have a natural coating,so when you wash it it washes off.Thats the only reason why you might put it on.For cleaning the eggs,I take a small towel and damp the corner of it with vineger then just place it on the stain and scrub a little bit.It should come off.