The difference between BOC and RS-MaxxMudd LL is extreme. The former is under 1.0 gain and comes with several build considerations. The latter is 1.3 gain and provides significant perceived contrast boost via such increased gain coming without reducing black levels. The additional Silver metallic is the reason because it's properties are enhanced...not masked, by the additional use of a translucent medium.
Your other choice from the other location is simply a white paint that is overtly masking the reflectivity provided by the Mica within the Gray base of the Liqutex Silver. You might note that the ratio of White to silver is 1:1, and yet gain is only 1.0. Essentially, all that is being accomplished is the the addition of the Silver just keeps gain at 1.0, instead of it being reduced to below that level by the addition of the light Gray base of the Liqutex.
(...and it s funny how those who SWORE for years that our determined use of Mica-based was a gross injustice done to the DIY Community, now advocate it's use....
Sorry, but much of what you see elsewhere are simply clones and/or re-worked AVS DIY formulas that are re-presented via biased tests and held up to be superior to their original fore-bearers. While such things are essentially Ok, since everyone has the right to adapt and re-work any idea or concept, following up such efforts by demeaning and discounting everything else shows a bit of pettiness and desperation for acceptance. On AVS we concentrate on helping people make the right choice and then we keep on helping them through the process (...if they'll let us...
) until they reach completion. THAT
is a big reason we have as many success stories as we do.
curttard, you only have to look at the far greater numbers of those who have actually tried RS-MM LL and the excellent results they post to ascertain the facts you need to make a decision.
sprat paint that BOC with RS-MM-LL. You'll need to prime the surface with any extra white base you have (2 coats-a "brush" sanding-3rd Coat) and it will let you jump start your effort. Of course the use of Sintra precludes the need to Prime...you simply go directly to applying the RS-MM-LL via Duster coats.
However unless your willing to downsize using the 5' x 10' Sintra...or get a 5' x 12' sheet of WA-DW and paint on it, by using a bit of extra effort to condition the existing BOC screen you can retain the size you have.
Honestly though...comparing BOC to any light Gray, positive gain surface is gonna be a mismatch. BOC is essentially a Flat sheen'ed surface that is 0.90 gain at best. As such, it often does show a lower level of Black rendition than a pure 1.0 to 1.2 gain white surface. But it also makes colors and whites look duller than desired. Sheer Lumen output can mitigate such an issue, but does nothing to combat the deleterious effects of ambient light, or that of returning reflected Projected light. RS-MaxxMudd has more ability to offset such because of it both having +gain and a degree of a very light gray. And by using a small additional amount (1-2 oz) of Liqutex Basics N5.0 Neutral Gray ( ...just 3-4 spaces to the side of the Silver on the rack...) you can effectively make it a couple shades darker without grossly affecting the inherent gain.