Flattening some wooden spoked wheels. I have MS, Euro, and production clear on the shelf. I have three coats of MS on the spokes and sanded with 400 grit. I'm looking to spray a couple coats of flattened clear without a bunch of experimentation. Could someone lead me in the right direction to start from and I'll do some sprayouts to get where I need to be. I've used SPI flattener several times but there is a lot of differences between the three clears as far as thickness and reducer levels. Thanks for any help to get it done quicker. It's been in the upper 80's and 75% humidity lately.