This has been discussed before, and I've read through those threads and watched all the youtube videos there are to watch, but there seems to be a ton of inconsistency on this issue so I thought I'd bring it up again.
My radiators are all covered in old flaking aluminum paint, so I want to put a matte layer on top to increase their radiant output and clean them up a bit. Aside from getting these done professionally (I have 11 radiators, so forget about it), it seemed to me that the best choice out there was Rustoleum's High Performance Enamel Spray.http://www.rustoleum.com/product-catalog/consumer-brands/professional/high-performance-enamel-spray
The problem with the high-heat paints is 1) I couldn't find a grey paint that didn't contain aluminum, and 2) the amount of off-gassing from these products is abysmal. In a million years I wouldn't paint something that was designed to stay in my house with that stuff.
The HP Enamel I linked above does have a grey that doesn't contain aluminum.
But now I'm thinking even this is not worth doing. It occurred to me that I have steam risers all over the house that get to the same temperature as the radiators, and they're painted. In fact, they are freshly painted with the same 100% acrylic paint as the rooms (Benjamin Moore Regal Select). The "internet" says not to use this kind of paint, that it will get tacky when heated, will bubble, or will peel. I haven't experienced any of that - all the risers are in perfect shape, and there was absolutely no smell when the heat was turned on (they had maybe 2-3 months to chill out before the radiators turned on). Benjamin Moore doesn't provide heat data on these paints (they give a boiling point but I believe that refers to the liquid paint, not dried paint). This stuff is no-VOC, readily available, downside is I'd have to paint it on with a brush but honestly with a baby in the house I can't see myself ever getting the cans of spray paint out.
Given that these seems to be as many opinions as there are people on this issue, am I "just as right" as anyone else? Or would I be making a big mistake by going forward and using the Benjamin Moore?
PS - I suppose one potential downside of the Benjamin Moore is that I might have to prime the existing aluminum paint before - not sure how well it will stick otherwise. I could paint a small swatch and see if it takes.