So I just purchased some Duragloss 105, 601 and AW. Then I stumbled on this thread. I was going to try the combination out for a solid winter prep, and then wondered to myself whether this coating would do the same job and possibly better. Would there be any reason to use a combo like D601/105/AW on top of a coating like this? Or would the added benefit of having another layer only be marginal compared to the protection provided by the DP coating? I'd hate to apply a coating like this and then spend the time applying D601/105/AW if there's really no point.
Also how would you rate/compare the DP coating to others such as opti-coat, vx1, etc. Better, same?