That's how I paint under hood areas to make them somewhat OEM satin looking. I mix my base as recommended, and the clear as recommended, then mix them together 50/50. Seems to work fine. I am not doing this for projects that really need to match finish exactly, Just look fine to me.I've heard of mixing base with clear to make a little ss paint to do touch up...I got a place on the hinge side of a door jamb I got a little thin on color....if this will work, what is the mix ratio ? Ppg omni + spi clear..thx