How do you know what kinda scratches will show through powder coating/see them when powder coating.

I realize deep ones will but what about 220 grit sand paper scratches. They feel smooth to the touch but you can see them when the light hits them...

I'm being lazey I guess don't want to have to work up to 600 grit sand paper if there's no reason I know that the powder coat can be alot thicker then spray paint and spray paint sometimes covers these kind of scratches. I'd also like to give the powder coat alittle something to grip to. (I know that's not really ness but I want to anyway)

it wouldn't be clear PC I know everything shows through that.