I have some paint questions, suggestions for you.
May I ask why you would sand with 2000 grit? Most paint requires 400-800 grit before top coat. Any finer and it won't stick. Paint sticks in two ways chemically bonds or mechanically. Only the final clear coat chemically bonds.
Is this before laying down the black paint? Why use rattle can black? If your gonna have a spray gun you would be better off buying a gallon of single stage black (Mercedes is darkest). It would cost about as much as rattle cans and look waaaaay better.
Edit... Also, using rattle can paint will cause more orange peel which will ruin the look of the chrome.
Back to rattle can clears. I would stay away from clears for a job like this. Get a good European urethane clear from the paint shop, not pep boys. Again, this is the most critical part of the caroming job. This is where most people ruin it (like myself). Clear coat will alter the sheen of the chrome look based on mixing, air temp, etc. I would practice an entire piece first before trying on your real armor.