Not sure if this meets the criteria of class! I did venture out in snow to get rubbing alcohol to try with Qtip.  I got inspired by piece of packing that probably came with some art supply I have never used!

These were Crayola colored pencils and I think cotton w/c paper so was but rough. Either way I like it oriented both ways. Sorry for long story but is boring when snow bound. I did try to darken it by layering again after the alcohol but did not change much.