Is there something I can add to gloss lacquer to turn it into semi-gloss? If so, what is it called?

I have four gallons of gloss Deft that I got for 5% off at a local hardware store that was discontinuing the product. I am about
out of the semi-gloss that I bought there, so I would like to kill the gloss on this stuff.

Any Ideas?

--
Al Reid

How will I know when I get there...
If I don't know where I'm going?