Paint & Paper Library arranges its colours in five shades from light to dark to help select coordinating colours for ceilings, cornices, walls, doors and woodwork. If you are decorating around bold furnishings, such as a sofa or curtains, look at paint colours from the same fabric house as they are most likely to be sympathetic.
Plastic sheathing and masking tape was not available at the end of the painting project for whatever reason, I have no idea, but you have a Paint Brush that if not cared for will eventually dry up. Last solution that works well, is to take a sopping wet rag, wrapping the Paint Brush up like that burrito you missed wrapping up earlier. This will buy you some time until either you use the paint brush again, or you can properly clean it.
If you are grappling with the problem of choosing a woodwork colour to go with neutral walls, check out Architectural Colours by David Oliver, the founder of Paint & Paper Library. He arranged his off-whites for ceilings, cornices, walls and woodwork in chromatical groups and the concept has been so well received that chromatically arranged colours, such as soft greys, greens and pinks, have been introduced.
Definitely good inside the house is a new vinyl primer-sealer to be used as a base coat under any paint. It dries in as little as 30 minutes.
Remember, you will need to clean the airless in that same fashion before you return the airless back to the rental company.
Even if you don't need to apply a coat of primer before your new coats of paint, doing so will always save you money. Whether you use white or tinted primer, a coat of primer is always more cost effective for one simple reason: It is cheaper! In fact, primer may cost as little as half as much as standard paint. If you get it tinted the same as your paint, then it is cheaper by the coat. If you use white, as in the first scenario above, it will also minimize the number of coats of paint you have to apply. Either way it reduces how much paint you have to buy. Do you want to learn more about maximizing your paint color coverage, minimizing your paint usage, optimizing coats, and perfecting your primer?
Traditional Paints. Available from specialists such as Farrow & Ball and The Real Paint & Varnish Company, lime wash and distemper paints can be useful for restoration projects, although some of the contents are potentially hazardous and can irritate eyes and skin. Use the modern equivalents where possible, as these are usually safer and more effective.