Flattening oil base polyurethane ?

I have several gallons of gloss and semi gloss oil base urethane from when I used to refinish hardwood floors. is there a way to chemically flatten it to provide a low sheen?

thanks

Flattening agent. Contact Jeff Jewitt at Homestead Finishing, he may have that.

I have never heard of anyone adding that stuff themselves, although some folks mix gallons of different sheens to taste.

What I would do is use whatever you have at hand to build up the finish, then satin to finish it off (or whatever).

I've never rubbed oil poly, but I've seen articles showing how to do it. That's another option: rubbing to a soft sheen.

Read this article:

http://homesteadfinishingproducts.com/rubbing-out-finishes/

Good luck.

add flattening agent or buff with 000 steel wool. I have gotten full gloss poly to look like satin with sanding/scuffing that way.

Sure, apply the desired number of coats of the high gloss to get your desired final film thickness, then apply one final top coat of the semi-gloss poly.

And then hand rub or buff to the desired final gloss level desired.

Use the appropriate abrasive(s) items to rub/buff. Steel wool, or synthetic steel wool (aka ScotchBrite pads), or rubbing/polishing compound(s), or rotten stone or pumice, or wet-dry paper(s), etc.

Just don't end up cutting through the layers of finish or you can end up with 'witness' lines or haloes at the transition between layers.

And a +27 on reading that article from Homestead Finishing about rubbing out finishes.

Thanks for the input. I am planning to use it on rough sawn pine, so rubbing it wouldn't be an option.
I could use what I have on hand for base coats then top it with a low sheen.