... So after reviewing everyone's comments this last week (thanks PB and biglyle), I went back and reviewed several of the existing 'formulas' that have been posted and threw them into a spreadsheet to normalize and compare quantities of different components. Following the latest RS-MMaxx and the first post in this thread, I ended up with a 'hybrid' mix that, when compared against my temporary UPW Flat screen yielded some really nice results -- much improved black levels, little noticeable impact on whites, and a beautiful 3-d look to the overall picture that was totally absent with the flat white screen. I was so happy with my test panel that I ended up painting my whole screen with it!
Nonetheless, after a few days of enjoying it I noticed in some bright highlights a bit of uneveness in my application -- very subtle, but it turns out my drywall is a bit rippled even after some light sanding, and the paint didn't stick perfectly evenly.
I'm about to start over again, but wanted to share what I used and perhaps see how it compares to the characteristics of biglyle's and others who are working on this.... The overall look of this combination is silvery grey in the bucket, but on the wall its very light creamy white/grey yet yields a much improved image to my eyes. The ambient qualities are there, but they are perhaps not quite to the level that some of the other efforts are showing. I'm curious what is different here. I worked with the pigments and decided to leave them out entirely for now. There is no noticeable color shift or anything in this mix...colors look richer over the UPW.
8oz Minwax Polycrylic Satin
7oz Behr Deep Base
5oz Delta Gleams Pearl
8oz Delta Gleams Silver Metallic
3oz Behr UPW Flat
I rolled two coats using a RollerFoam 6" roller over a couple coats of Behr UPW Flat Enamel.
The mix is perhaps ever so slightly a bit too slick, so next time I'm going to reduce the polycrylic a bit, but not sure what to do with the silver and UPW, etc to make the mix a bit deeper 'grey/silver' looking without making it too sparkly. At present when dry its a lot whiter looking than biglyle's panels appear. Seems like a good starting point for a dimmer projector. I've got a AE900 and I think I have some headroom to go a bit darker grey. Its 90% of what I was after already, so it doesn't need much adjustment for my purposes. I think its my rolling technique at fault right now -- maybe I'll ditch the rollerfoam for the 1/4" nap mentioned earlier.
Thoughts? I'd appreciate the feedback. This is so much fun -- I feel like a mad scientist
Feel free to PM me if anyone wants to discuss 'offline' -- I'm eager to finalize something for thanksgiving viewing!!!