Anything from the PoorBoys line. I found out about Poorboys products last year and after using it some and trying other products, I was hooked on Poorboys. Starting with the clay bar and spray and wipe through the SSR's, Pro Polish, EX and EX-P (depending on light or dark car) to the Natty's wax. The Natural look and Bold and Brite are great too. Why??? They All Work!!!! Easy to use, Can be used in sun or shade, Easy to remove even if you missed a spot and found it hours later. The shine it gives off is phenomenal and they are really resonably priced when you compare them to other products.
I will be posting before and after photos of my GTO in the future. I have used many many different products in the past and right now in the middle of redoing the shine using only Poorboys products. I have clay barred the car and have done SSR2 and SSR1 at this point. I took the car out the other night and my friends at a local cruise thought I had repainted the car. When I told them that I was only at the swirl removal part of it and there was no wax or polish on the car they could not believe it and cannot wait to see the finished product. Neither can I as I am amazed that it looks better at this point than when I had it at shows last year where where I have won many trophys. The only thing I can say is if you have not tried Poorboys products yet then you should.