Hi @Soundchasr,
with a subject like this (similar colours, crossing lines ā¦) you need a tool, where you can mask precisely. To do so in PL 4 is somewhat difficult at present ā depending on what you are going for.
Some time ago, I suggested to improve the manual masking options (combine masks, enable to draw straight lines with the brush / eraser etc). to make life easier. 
For these cases I prefer to use a pen tablet ā see Contest: Can PL be used to simulate lighting from flash for portrait shots ?! - #30 by Wolfgang
have fun, Wolfgang