Roof coating - what a process!!

This weekend I decided to recoat my roof with the Dicor EPDM product. What a nightmare this turned out to be. I followed the directions and cleaned off the roof. I removed all A/C, hatch, fridge etc covers and then masked off the entire RV with high quality blue painters tape. Then covered the entire RV with drop cloths. I sprayed the Dicor step 1 activator and waited 15 minutes before using a stiff brush and a hose to wash it off. Unfortunately, even though I was very careful with the hose, the tape and plastic drop cloths peeled off the RV. I didn't notice this for a few minutes and when i did I sprayed the side of the RV. I ended up having to rewash the entire RV. After drying I noticed streaks/stains on the driver side and a few on the passenger side. I scrubbed the sides, but the streaks did not come off. I'm hoping some rubbing compound/polish will take them out because I don't want to do the entire ZEP process again.

Anyways, I then coated the roof with the Dicor white EPDM paint. I edged around everything and it seemed like a put on 2 fairly heavy coats of the coating (per the instructions). However, I barely used 2 gallons. My RV is 37' long, has fiberglass end caps that cover about 2 feet on each end, 3 large skylights, 3 ceiling vents/hatches, 1 fridge vent, 1 bathroom vent and 1 antenna. I was told that the coverage was 125 sq feet and that I needed to buy 4 gallons to be safe. Not sure if I did something wrong, but it ended up looking good. In the before photo, I never noticed those lines in the roof before. Anyways, any suggestions or comments on the lines or the fact that I only used 2 gallons? Do I need to do a third coat or can I just touch up this as needed?

Thanks.