Hi all,
That "high quality paint" would be
Glyptal. Been using it on all my rebuilds for several years.
The oiling problem is there because the engine was designed to power luxury cars at highway speeds, not for racing.
Joe Mondello developed his modified 455 rods to address the issue and, in street applications, they worked well up to 5500 RPM with the bearing clearances he advised. Those increased clearances were the reason for using the high volume pump.
More side clearance on the rods will accomplish the same thing, and the crank grinder can open up the main/rod bearing clearances at the same time. How much will depend how the engine will be used.
Norm