Changing graticule and land thicknesses

[Alice Larkin <a.larkin@xxxxxxxx>]

Hello, is there any way of making the land outlines and graticule lines on 
a polar plot lighter, or dashed. My problem is that all the graticule and
land lines take over my contour plots, and making the contour lines thicker
just makes the plots look even more messy. I just need a way of making my
contour lines stand out without losing the land etc. completely.
Alice