I'm running Finasteride for the first time and my hair is much thicker. I was running winny with test. I'm using rogaine too but i've never had thicker hair due to Rogaine. I'd say give it a whirl but i also hear people saying that too much finasteride can take away from your gains. I'm only on like 1.5 mg. a day.
1.5mg is all you need for help with the scalp, 5mg is for BPH.
Winny is a DHT derivative and will act on the scalp with or without 5-AR, propecia wont help there, but will with test, hurt with nandrolones.