On Friday, January 2, 2015 10:46:33 PM UTC-5, Chris wrote:
Roller or spot brush?

I'd say it's very likely going to be fine without priming. I wouldn't
prime, but if you want to be sure, then prime. If it doesn't look
perfect to you, you could second coat that area later, while you have
the paint going for another wall somewhere, just come back, hit it again.
If you do prime, I'd use a roller to make sure there isn't a texture difference.