I have a 2019 Q5 which I had been using Meguiars Hybrid Ceramic wax but didn't like the residue on my windshield from runoff. I had some old Eagle one wax as you dry and using that till it runs out. Thinking of a DIY Ceramic Coating. How doable are they. Car is never garaged and is our daily. I plan to keep car about 2-4 more years , that is why I wont have a professional job done($$$$). Just looking for something to make washing a little easier.