"Electric Comet" wrote in message
news
i used to always wipe the dust off from sanding between poly coats

but for some stuff that did not need to be presentable and i coated just
as a measure to keep out ambient moisture i left the dust on between coats

i found that the dust seems to go back into solution once i applied the
next coat and as far as i can tell there was no downside at all

now i do not clen the dust off and i get better coverage and use less poly

do the higher end finishes require strict cleaning of the sanding dust
or do they take the dust back into solution

No poly will dissolve previous coats, dust or not.