Thanks guys :) Another update, fixed the engraving - had to flatten the blade and delete all poly's to a flat plane then extrude borders and create loads of control edges etc. Should be able to load up the original blade shape and follow that with the improved edge flow...tomorrow!
@Flewda thanks for the info, had no idea you could bake a bump map into a normal, thats very handy to know :) Presume you could do this with rendering too? Might save some time, like here lol @Rhinokey sounds like you use mudbox? was thinking of taking it into zbrush for a few scratches here and there but not really sure…