Countdown to Christmas 2- Christmas mail art??

I've loved being part of Ginger's mail art exchange this year.......it's been great fun decorating envelopes to post across the world......and just as much fun receiving them......so sending christmas cards in plain white envelopes seemed a tad boring in comparison.
But.....and it's a big but.......I send a lot of cards......and I don't have time to highly decorate them all.....so could I find a simple solution......well.....I thought I had......but as you may have noticed.....with me......simple doesn't tend to be quite as simple as I'd envisaged!!!!!

I began by spraying a whole group of envelopes at once......so far,so good.....these were all left to dry for a couple of hours.

I then stenciled snowflakes on each envelope using a brass stencil and a white paste.......slight 'slowing down' problem quickly became apparent.......after about 4 cards.....the stencil began to ooze a bit......so washing it off was needed.......but not too big a problem.

I had, of course, forgotten that once the paste dampened the spray paint, it would mix the colours slightly.....but never mind.......the effect was still there.

And I do think they make a change from white envelopes......and they were still fairly quick to make.

But then our mail was delivered in the pouring rain today......and some of it was wet......and I now have visions of postmen with blue stained hands.......and christmas cards with blue streaks.......and the Post Office 'heavies' banging on my door demanding compensation.....and the recipients sending me their dry cleaning bills......hmmmm......p'raps I better not post them at all....or pray for dry weather [throughout the world]!!!!!!