Looking for paint tints and flateners

Sep 23, 2009
1,477
O'Day 34-At Last Rock Hall, Md
Someone recently posted here his pet peeve about caulk only coming in large containers, mine is the same only about paint. The marine industry seems set on gallons and quarts. I have a project that only requires a half pint, painting our cockpit seats non skid.
I am using Interlux Brightide polyurethane Matterhorn White which is close to the O'Day gray. For the job to come out better I need to use a flattening agent to lower the gloss and a dash of black to darken the shade. I have the quart of Brightside but the other two also only come in quarts and I really would prefer not to consume three quarts just to get 8 ozs of paint.
Any other tints or flatteners that might be available at the hardware store?
 
Sep 23, 2009
1,477
O'Day 34-At Last Rock Hall, Md
Well half of the problem is solved. Overtons does sell half pints of brightside so I can use maybe an once of black for tinting. Any idea what to use for a flatening agent?