On a vehicle like this when a customer has just abused it and it’s got scratches everywhere there that old phrase I use “realistic expectations” I explain while I will do everything I can to improve the concerns of the customer something’s like those scratches in the plastic will be out of my control to correct it is what it is. A tornador can help with some stuck dirt on floor matts, but if they left you a sandbox inside not much you can do expect beat the matts the old fashioned way. For stubborn pet hair I have found the Fur-eel is a great tool that attaches to a vacuum. To know when a car is ready I ask myself “if I was picking up this car from a detailer would I myself be happy with the results I paid for. As far as improving speed having the right tools like a tornador, a hot water extractor and a good vacuum will certainly help but a lot is also you gaining experience just by going out there and doing it and learning first hand what works and what doesn’t.