Thats the stuff we use at the Bentley/RR shop i work at... the owner has a couple of cads there and ive seen the stuff... the colors are a perfect match and its probably one of the best engine enamels out there as well as their other stuff... you can get some from Eastwood too... roughly same price and quality.
Engine stand? These blocks arent as heavy as you think... even an assembled longblock is well within the range of a 1 ton stand.
Our engines weigh less than most other big block V8's. A 2000# stand should hold three complete 500's and have capacity to spare! You've gotta go waaaay back, like the old Caddy V16's to find gas-powered passenger car engines even over 1000#. Sounds like your stand is built with big truck diesel engines in mind!
It is a four-wheel stand though, right? I have heard horror stories about those three-wheel stands tipping over.