GIGO (and there seem to be a LOT of self pub that really need a pros touch)
Funky margins are best fixed using the editor after careful review of EACH USE CASE.
and not a wholesale Nuke-em'
Margins could be used to convey a part of the story (where a Blockquote might have been sufficient), but until you preview that case...
Seriously, Learn the editor (and CSS).
A conversion, can introduce unwanted changes where a simple CSS edit is all that gets changed. Just what the user wants...De Funked