Use a piece of business card or a slice cut out of a file card to burnish the points. DO NOT use sandpaper (even crocus cloth) as it will leave enough roughness to make the points stick.

The voltage regulator point is directly behind the Field wire connection, and should start to function when the terminal voltage at the battery posts reaches about 14.5-14.7 volts. It sounds like it's adjusted a little on the low side. Monitor the voltage at the battery (not the Bat terminal of the regulator) and slightly increase the spring tension on the VR points until you get a good readout. The battery MUST be fully charged to get a good setting. Be aware that a digital meter IS NOT the best tool for the job. The VR points vibrate several times a second, and they generate enough electrical "noise" that a digital meter can go bonkers- - - -gibberish instead of a steady reading. Use an old-fashioned analog meter with a sweep needle if possible. The voltage setting will drop slightly as the steel cover is put onto the regulator, so adjust it a couple of tenths of a volt higher than you expect you'll need.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!