[palosanto]

As suggested by palosanto I have tried to use the freeform and it works pretty well with the stylus on a Samsung Pro. You just have to zoom in to be precise enough and the handwriting gives the score a customized aspect that is quite nice. I will try to notate one full score with it.  

Use also the highlighter in white or a filled white rectangle shape to mask the existing fingerings that I want to overwrite if necessary. 
In both tools change the size to 1 and choose the rectangle option for the highlighter.
I don't use the highlighter for anything else but if you do use the rectangle shape instead.