The Gemara says that a person who looks at the hands of the Kohanim during birchas kohanim loses 1/500 of “ma’or einav” (commonly understood to mean eyesight).
Although the Shulchan Aruch rules that one may not touch a raw egg on Shabbos because it is muktzeh, nearly all commentators explain that this is because touching a raw egg is guaranteed to cause it to move.
IF the story is true, it would demonstrate that the Chofetz Chaim was of the opinion that it is in fact muttar to speak L”H about oneself, albeit perhaps not a good idea.
The Mishna Berura describes the procedure of the three steps back and the bowing towards the right, left and forward quite carefully.