Problem weight painting

Can’t seem to get some areas to complete my weighting. Also the bones is blocking my view is there ways around these two problems?

I can’t seem to get to paint what is circled yellow i tired zooming in and out changing view and my brush size.

From the picture it seems it might be easier to just mark the vertices manually?
In normal edit mode, you can just assign weight to selected vertices from the object data panel

to hide the bones behind existing geometry turn of X-ray in the object data panel

thanks ill give it a try.