I'm following up on a few leads that some friends have given me on making the latex for the cape more opaque, and on getting the tint right.
I went to ye olde Home Depot and picked up a little can of this stuff:
It's a primer coat for painting walls, and is intended to cover up spots, grease, dirt, and even old paint.
My order of universal tints also arrived.
I mixed a bit of the Kils in with some Burman latex, and did some tests. It certainly went on a lot more opaque than the untreated latex, and that is cool. More interestingly is that it sort of changed the properties of the latex so that it brushed on REALLY smoothly, and did not lift up from the silicone at all. This was an interesting and unexpected side effect.