This product is very easy to use, covers great and fill nicely for light scratches. (Get high build if more that 100g scratches) PREP PREP PREP, This stuff covers really well on clean or contaminated surfaces. Granted this product is not exactly for the DIY guys but including a blanket sheet of instructions, A Chart if you will. So, people know the mix ratio, Dwell times, flash estimates, best temp range, ETC. That would make the job so much faster and yield better results and less frustration. You really have to dig in some cases to find any of this information and i don't feel it should be that hard. A one time investment to create a chart would better suit the masses.