Convince me.

[Uncle Tony]

Convince me
Convince me that I am not mad
This padded cell is the home of artistry
And this straitjacket the uniform of creativity.
Using the blood of the wicked as my paint
The bones of the crooked my brushes,
we will paint a mural of the duplex,
the duplex that is my mind. 
For the shapeless and unhuman entities next door
tell me I am sane.

I'll do no such thing, you straight crazy!  I kid, I kid.  Second line begins with "This," but it seems you went out of your way to break up a very natural rhythm by beginning the third line with "And."  Same goes for lines 4 and 5, i.e. "The blood...", The bones..." has a natural rhythm, which was broken by adding "Using..." In summation, I think you have too many unnecessary words, that in fact take away from this piece.  "Less is more."