There are ultrasonic threads here, on iBob, Classic Rendezvous, and likely countless other (vintage) bike forums with members speaking about hushed magical, calculated, elixirs for soaking, cleaning, rinsing, etc. Then trials of woe and despair when some fail and alloy is eaten, or something doesn't come out brand-new-out-of-the-box-clean on the first attempt. I shake my head. This, above by sloar, is the way. Hot water. Dawn dish soap. Harbor Freight brass or steel brushes (depending on the components metal type you are scrubbing) and elbow grease. There is no magic to it. No secrets. Water. Soap. Scrub. Done.