I have colored my own hair for 15 yrs. I started graying in my teens, by 30 it was pretty intense.
Last time, I tried Clairol Perfect 10. It was about $11. Comes with a comb-style applicator, instead of trying to squirt all the stuff from a bottle tip.
WOW, did that go on fast! Took less than half the time! Maybe 1/3, 1/4 the time to get in on my hair. Then, you only have to leave it on 10-15 minutes, instead of 20-35 minutes.
Rinsed out easy too.
Two thumbs up!
Okay, it costs more than some, and there aren't as many colors to chose from. I can deal with that for the ease of use and saving all that time! My arms were fine after doing my hair. Awesome!