My yellows ended up being a total disappointment and hard to work with. I ended up tossing 3 paints (I vaguely remember trying to paint with yellow and being totally disappointed in my skill......I now realize it's both hard to paint with yellow AND I had totally sub par equipment).
The problem with this is that it may also just look like I have no idea how to paint. *Sigh*. I do think it is better to have some subtle colour on there instead of bold murals on the outside. I'd like the strongest colour to come from the circle inside.
You can see the terrible coverage of the yellow on the griffon on the second story. This is when I basically gave up with my current paint and decided to toss it.
link, but the short youtube video had me very interested. I ended up ordering through Firestorm games, as finding a supplier in North America seemed challenging and they offered free worldwide shipping with a minimum order (*cough cough, not hard to be twisted into that*).
I tested on the exposed bands of iron on the top floor. Painted right over black primer I was fairly pleased with how easy and good this looks. It's a fairly thick fluid, but certainly not gloopy or sludgey. I think you can continue to build up the effect, but a single heavy application got the effect I was looking for.
I proceeded to apply the rust effects to all the iron rings, chains, and the front gate. I aimed to have obvious runoff from the disintegrating iron that is staining other places. Not sure If I'm totally happy with the threshold under the gate, but it will be fine for the time being.