Hi Dan...yeah, keep us informed.
I suspect you will simply corrupt the methanol/ethenal. It really doesn't matter about the blends. The molecular combustion will remain pretty much unimpaired. The butinol componet will still burn sooty.
I mixed all sorts of stuff in an open alcohol burner. There is simply too much fuel for the air. Some sort of presurized jet, a lot like a cannister stove, is needed to really pump air into the fuel/air mix.
I tried WG, parafin, kero, benzene, some fairly pure octane, acetone, etc... lots of mixes with plain old petrocarbons. All have a similar problem. If you add more than about 1-3% of these, they all burn sooty. That isn't enough to boost fuel heat. Even ispropinol does about the same, but I have never gotten it to burn efficiently even though there are some commercial stoves out there. After the alcohol is burned off you simply burn the carbon/hydrogen. This is the same with all longer chained alcohols and simplistic petrochemicals(butane, propane, etc.) Follow? Note that is is NOT really what is happening, but fairly well approximats alcohol's burning.
I think I would research a platinum catalyst, similar to the platinim coated meshes found in labs. This is expensive as hell, though. But this would lower the energy needed for complete combustion...sililar to those found on kerosene heaters. (Note that the coatings on that stuff is extreamly thin, 2-3 molecules thick electroplate. Even touching them will damage the coating...never try to clean them mechanically.) Once the catalyst gets hot enough, it will produce good heat. But, if you are going to use a catalyst, why bother with alcohol? Even WG has much higher heat...