Those cracks aren't all that bad, but it is the White Wax that is stuck in them that makes it stick out like a sore thumb.
Take a soft toothbrush and some dawn dishsoap and water and see if you can get that wax out of there.
If it is tuff coming out, might have to let it soak for a bit with a damp wrag. Can help it along with a wooden toothpick that you have chewed on for 5 seconds to help work it out.
McGuiar's has some paint polish Products to use as a final polish that don't turn white, but still seal the paint.
McGuiarsdirect.com
Can try some of this to help clean out the wax and polish the deck lid.