I'm purchasing a condo in the mountains at a ski resort that needs a total repaint due to past owners poor color choices. The common walls of the condo that separate the units and also act as a fire stop are solid block set on end such that the narrow edge is visible with deep mortar groves. Wall has been previously painted (either orange of yellow) and I want to take it to a more neutral off white/beige. Given the nature of block, and the deep grooves, how much should I discount the amount of coverage per gallon to account the odd wall make up. Really struggling on estimating paint needs and what amount of coverage I should expect per gallon. I'm also struggling on painting by brush or spraying - either way, there is concern about major drip marks from all the relief of the walls. Here is picture one of the bedrooms [ATTACH]72526[/ATTACH]

Hi everyone. I acquired a plastic twin sized race car bed and would like to paint it black and turn it into a bat mobile. My almost three year old will be transitioning into it and lovvvves batman. I'm wondering what type or paint would work best. I'd prefer to use spray paint. Which would adhere well, be safe for my son, and look well? Thanks in advanced