By no means an expert but happy to share what
I've learned so far. I don't see the need for a sealer coat of
Future. I’ve done several vehicles
and dozens of accessories with hairspray and
never sealed the base coat. Very important though
have a really well cured base coat.
One of the 1st things to decide is what king of wear you want.
Large or broad areas or small tight patterns. For the
large areas you want it to flake off easily. For small tight
stuff, like if you were chipping along plane lines on
a Japanese plane, you want it to be more difficult to come
off so you can control it. For the top coat I
have used both acrylic and enamels
in light and heavier coats. The coat of hairspray can
be lighter heavy too. The amount of cure time can be short,
just touch dry to a longer dry time, not never fully cured. For each
pairs of variables listed the 1st one will flake the easiest and
the latter will take more work.
The 2 extremes...
Heavy hairspray, light acrylic top coat with short dry time.
Once the water starts working it gets going real fast
and it will be easy to take off all, or most, of the top coat if you are
not careful. Paint will come off with a soft brush and light
strokes.
Light hairspray, enamel with a longer dry time. You may
to get things started by making very light scratches in the top coat
of paint to give a place for the water to get underneath.
A tiny drop of liquid soap will break
the surface tension of the water so it sheets instead of beading
up. Wait a few minutes and start scrubbing, lightly
at first to see how it reacting. I have had to use really stiff
brush that I made by cutting the bristles done to about 1/8" and scrubbed
like I was trying to get red wine out of the carpet.