I leave bolters of of marines when it covers the chestplate, as well. Usually I've built the arms and bolter together then paint the pieces at the same time. Then I glue the arm assembly on after both are painted.
And just like Nord said, I know those parts are unpainted and can see the missed areas on any miniature I look at.
And just like Nord said, I know those parts are unpainted and can see the missed areas on any miniature I look at.