While thinking about the soft focus challenge and too cheap to buy a lens. And don't even want to mess with vaseline. I discovered panty hose, yes, colored panty hose toes. I cut several colors of my wifes oldies and discovered some interesting things. They stretch nicely over my lens and bingo. I didn't do any set-up, I shot my daughter with flash on slow, at approx. 1/4 second, so red-eye happened. See several examples below.
black
toupe
white
I also cut blue (two colors), gray and a goldish toupe. Only problem my model walked out on me.
The first and third ones worked quite well, but I find the second one a bit too soft. I'm not sure it's the colour though, maybe something to do with the thickness of the pantihose, or the amount you stretched them. Keep experimenting.
you know sometimes this really annoys me when a tip is posted in this portion of a challenge. I had someone give me this suggestion last night and I tried it too. I liked the outcome also and was planning to use it in the challenge, now I have to reevaluate what I did and think is there enough difference in it..