Just received my first Norton combo stone.
I lapped both sides with wet sandpaper on glass surface until they were flat and smooth.

I honed 3 razors on it.
I know a DMT plate is best for maintenance but cash is short right now and I need to remove the metal residue on both sides.

What's better :
a slurry stone like the ice bear
or should I lap again on wet sandpaper until surface is clean ( my concern is I'll wear out the stone faster this way)

Given the width of the stone I don't need to use X stroke.
If the stone is perfectly flat and even is there any benefit in X strokes at all?

Thanks for advice