Bob, your brick/mortar work is looking great! When i did mine (long before this forum and back when Vane Jones still published OGR), i simply diluted the cheapest white craft paint i could buy, smeared it over the brickwork with a paper towel. If the paint was too thin, i thickened it; too thick and i thinned it; wiped it off with a damp paper towel; maybe even a dry one. If it didn't look right, i washed it off and started over. No percentage ratios or extra ingredients. When i was happy with it it got sprayed with rattle can Dullcote. IMO we overthink these things way too much. My overthinking consists of really looking at the buildings, roads, etc. around me.
