No help on where to get paint. On the 57 I had it painted gloss black and it is a pain when the sun shines on it so I recommend a semi gloss paint. I would think and rattle can would do to paint your dash.

All depends on the angle of your windshield. My 61 truck dash is done in base/clear and no reflections.
Had an 80 Lincoln Town coupe and couldn't even put armoral on the dash, I couldn't see anything with the glare. Ended up using a dash mat on it.