Bleeding brakes...no luck

[CriticalMass]

I took over maintaining ERA #164 recently and today I had it up on jackstands. I figured I would flush the break fluid since I don't know when it was last done, and this way I'll have a baseline for the suggested (by ERA) 2 year flushings. I had never flushed break fluid before, but I read the ERA manual and it seemed simple enough.

I started with the right front but was never able to get clear fluid to come out...after about 2 pints. The flushed fluid got clearer, but not quite clear. Are my expectations too high? Should I be shooting for the flushed fluid to appear the same as the new fluid? If not, how should I decide when the system is satisfactorily flushed?

And in addition, even though I was careful, air was introduced into the system so then I started trying to bleed the brakes but was never able to get air bubbles to stop coming from the bleeder nipple. And the air was coming out in significant amounts, so I think air was being drawn in through the nipple's threads. What can I change to prevent this? (I ensured the reservoir level never got too low)

Also, from searching I read a little about forcing fluid INTO the bleeder nipple until air bubbles come out through the reservoir. I have the equipment to do it if its an easier process. Would you suggest it? Anything special I need to know to do it correctly?

Thanks.