@Mikey

There are a couple of ways to reduce the grey skills of a player down to 1%.
1. The fair way: You buy a player. You train the player with drills which will increase ONLY the white skills (1-2 grey may still increase)
You keep the player in your team for 4-5 seasons. All skills drop 20% each season and by 4th or 5th season, you get a player with high white and low grey skills.

2. The "not-so fair" method: Refer to this post
https://forum.topeleven.com/top-elev...tml#post471099

I have been following the first method for quite a few seasons.
Won my first treble last season with a team which has been together for 5 seasons now (atleast most of the players)
If you want to train only white, check the training tool provided in the forums.