I generally sand to my furniture to 400 grit and use an oil-based varnish.

After having sanded a rocking chair to 400, I realized that I want to apply a water-based dye followed by an oil-based stain. I have read recommendations to sand only to 180 or 220 so that the wood will accept the dyes/stains.

How do I correct my over-sanding? Is it as simple a sanding the piece with the desired final grit (180 or 200)?

Any strong recommendations as to whether 180 or 220 is better?

If it matters, my chair is made of quarter-sawn white oak.

Thanks.