We hand-brushed the entire thing. Last time we did it, I rolled it and wasted over half of what we bought. Last time we used 10 gallons... this time we used 6 gallons. Took forever and my knees are sore as ever, but it looks 10x better and we saved about $130 doing it this way.
Believe me OTF- this is NOT something I enjoy what-so-ever. Hoping to not have to do it again for about 3 years.