Tkamiya, that is the general idea. Others with experience doing this could comment with more specifics - ie at what point during development is it best to flash, how quick to flash, right wattage, bulb distance etc.

By the way in printing technically this is not solarization as it is a partial reversal. It's the Sabattier effect.

There's a good explanation with procedures in The Print from the Time Life photography series, but no doubt there are also APUG members who have experience doing it and can direct you.