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I'd avoid olive oil & just get the real thing when you get the wet & dry.
I use the progression 320 400 600 800 1000 1200 or thereabouts. I'd go up to 2000 if i could get any higher grit's round...

Sometime's that's just the way it is.

Wet & dry paper is what you should be using. You can use it with water, but you'll find you get very good results with a light oil, such as WD40. It seems to...