I have used two spray products from turtle wax that are very amazing and the only reason im not using them now is because I fell into a free stash of collinite stuff. Anyways becuase you are in michigan an not in a southern heat belt, you can get excellent durability from Collinite 845. I would hold it up to retail consumer ceramic sprays any day for real world use, and it goes on the easiest of any liquid wax. In hot beating sun rays, no it does not last as long compared to ceramics.
As of now, Turtle Wax has outdone themselves with two products as mentioned above, here they are;
Hybrid Solution Ceramic Wax Spray Coating:
The #1 selling ceramic car coating is the finishing touch to a pro-level detailing job in your driveway. Spray on a clean, dry car for the best protection
www.turtlewax.com
Pros:
-Better Shine, very awsome durabilty, good beading, and overall not bad to apply. Price is awsome for the added shine.
Cons:
-2 or 3 bucks more than seal n shine, can give a mottled spotty look if applied too thick, but not to worry, 48 hrs later or one or two washes will correct this issue. Must throw out the buffing rags and applicator pads when done as it does contain enough ceramic to scratch the next car if you reuse them. Takes 48 hours for the coating to reach full gloss level.
Ice Seal n Shine Hybrid Sealant Spray Wax:
Ice shine n' seal hybrid spray sealant uses a super hydrophobic formula and Carnauba wax to repel water and protect your car's paint for months to come.
www.turtlewax.com
Pros:
-A notch better durabilty to envirmonmental liquids, current formula is easier to apply, and it was a chemical miracle to the retail market. It may even cross over into the pro market, but many wont admit it. Very long lasting approx 3-4 months if used on a daily driver. Longer if on a garage queen. In the real world, this may be the very best and longest lasting spay.
Cons:
-If you want extra dripping wet gloss from your paint, this wont do it for you, and you really cannot top it with anything as you defeat its purpose. I find it one notch less glossy than the hybrid ceramic, and also fine it takes approx 48 hrs to reach its full gloss potential.