I had my best luck with Nu-Finish for years. About 6 months ago I tried Optimum's SW2008G on my work car just to see how it would do because it is a take-home patrol car and it sees a lot of miles between had wash and waxes (I put on 3-5k per month). I try to hand wash/wax once a quarter. The car gets covered with a lot of road grime, grease, asphalt from construction zones, bird droppings, bugs, severe weather, etc. so it is hard on paint and finish. I have been pretty impressed. I ran through a touchless the other day, and it is still beading like the day I put it on. It was far easier to apply and seems like I use far less to get a good wax job. I bought a jug and just put in my own spray bottle. Waxed the whole car in about 15-20 minutes. I still wouldn't hesitate to use Nu-Finish if it were all I could find, but I think I'm going to switch the Optimum for my personal cars as well.