Since we got all these threads talking about good products, lets talk about what DOESN'T work. I'll go first. Black Magic Interior Dressing - Can you say g-r-e-a-s-y? You'd be better off smearing cooking oil all over your interior, and it'd probably smell better too. This stuff was pure crap. All it did was attract dust and smear/outgas on the glass. I'll never again buy another Black Magic product. I replaced this with Durgloss #203, Eagle One and then a local product called Flashwax. Back to Black - Another horrible product. Doesn't last long and will wash off, leaving streaks where it runs down the paint. I replaced it with Duragloss #301 which not only looks better, but is also water resistant. Advanced Auto Tire Shine - They were selling this for crazy cheap one day, so I picked up a bottle to try it out. Yeah, that'll never happen again either. This stuff barely lasted a couple days because it always managed to sling off the tire onto the car, no matter what I did. Mothers California Gold Carnuba Wax - This was given to me as a gift and it was the first wax I tried on my Mustang. It just didn't give a decent look. Also didn't last very long either. Armor-All Hard Shine Wax - Same as above. Given to me as a gift and it just flat out didn't shine. Zymol OTS wax in the blue bottle - I normally wouldn't have listed this, except that it was outperformed by much cheaper products. Way overpriced. Meguiars Quik Detailer - Just did not perform. Seemed more like water mixed with some car wash soap rather than a true quick detailer.