-
As I understand it grit is a measure of particles per sq. inch.
If that's right, than 400 against 400 isn't going to give you 800 but should break down the cutting edge of some of the particles and so provide something of a 'softer' cut. Doubt that it would be shallower though, with quality paper.
Just thinking out loud here. For myself as there are more notes in the scale I'd be singing a higher one.
-
Sanding
If your frugel, you can start saving some of your used sanpaper, and use them for your light scuff sanding.
-
Well Anne I hope we haven't bamboozled you with all of this :(
Let us know how you go.
