[Gimp-user] How do you remove halos?

[Nu2Gimp <forums gimpusers com>]

> The "halo" is "anti-aliasing" pixels that are not painted because they
> have an intermediate color, and  the fill tool will either completely 
> paint a pixel, or not paint it at all.  For a complete explanation,
> and
> the good methods, see Proper subject extraction, background removal,
> and
> background painting 
> <http://gimpforums.com/thread-proper-subject-extraction-background-removal-and-background-painting>

This is confusing for me as a beginner.  Although I always want to know why
something is done and how it works, after a 12 hour day at work and in traffic,
I just want to know step 1, 2, 3...  Is there somewhere I can find instructions
like this?

Thanks for your help.

-- 
Nu2Gimp (via www.gimpusers.com/forums)