The powder all over, the mixing, the bits that just won't mix, the bumpy paint, the completely unpredictable way it sticks to some areas and not others (even after using milk paint primer), the way its flaked up in random pieces larger
than can be considered attractive «patina,» even after
waxing, its
short shelf life... The experience (disclaimer — I did not use the Miss Mustard Seed brand) really drove home how lucky I was that acrylics were invented!
Leather has very
short fibres, and repeated applications of creams and
waxes can cause the fibres to slip apart; rather
than making the leather more flexible, the treatments actually increase its tendency to split.