Problems with wet sanding

To all you professional finishers out there.

I tried wet sanding for the first time today however I have encountered one problem. Once I had finished I could see little pockets in the grain/ timber features that I hadn’t filled started to fill up with white residue. How do I prevent or fix the problem.

Any advice or solutions??

Cheers

Lee

Use a couple of coats of lacqer based sanding sealer for the first coats. no holes then.

The only thing I wet sand is poly, what sort of finish are you using?

Thanks Bob

I am using a Poly

Lee