Which is a better method for cleaning my Lube Reservoir and piping? Chemical Cleaning or a High Velocity Flush?

Chemical Cleanings and High Velocity Flushes are two completely different processes that achieve very different goals. A chemical cleaning is performed specifically to remove Varnish from an entire system. While a high velocity flush is performed to remove particulate and any leftover debris from internally failed components, welding, and all other contamination.