Originally Posted by Bear
Don't know why they don't recommend using 845 on trim and glass. I use it on both and am very satisfied with it. No white residue on black plastic trim at all and a very light coating on the glass seems to reduce water spots etc.
I have not tried it on glass but, you're right about trim; 845 seems to work just fine. It does not get cloudy or leave residue behind on plastic trim. The paste wax versions leave more residue behind on plastic though so I'm more careful when applying it.
If it makes any difference, having spoken in-person to one of the owners of Collinite... 845, 476 and 915 contain all the same waxes but in different proportions. All of them are varying blends of carnuba and synthetic waxes. 845 contains solvent to make it liquid for easy application and removal. The other two have no solvents.
From my personal experiences, waxes can be applied in multiple layers if they don't contain solvents. Applying wax with high amounts of solvent on top of other waxes, could thin-out the base so, 1 + 1 might only equal 1.25 or 1.5. My favorite way to use Collinite is to first use 845, let it dry and cure for at least 2 full days then apply a coat of 476 (fall/winter) or, 915 (spring/summer). The winter prep holds up all season even with all the road salt here. The 915 wax is best on show cars or dark colors. The two paste waxes are very traditional... not very easy to put on and not very easy to buff-out. Both are worth the extra effort. For me, waxing cars is my fun-time.
Ray