yeah,
I always paint my canopies.
I painted them green in my dark eldar.
And black in regular eldar.
Painting ontop of the plastic makes a matt colour and under it is more glossy.
With the dark eldar I painted the 'glass' colour under the plastic and the trim ontop of the plastic.
Also I painted in the targeting display before the glass colour...
I inked the edge of the trim, water tension holds the ink to crease.
This looks pretty good in my opinion.
Panic...