I am on the 4th coat right now, and I am still not able to get full coverage, Is this normal?

I am laying the paint down in thin coats, because i've been getting a lot of dripping paint effect on the fenders...but im praying sanding down will get rid of this, I just bought my 800 grit and I'll start tomorrow on it.

Heres some progress pics so far:







Heres a spot you can see there isnt full coverage