I might be inclined to ask how long back was the Collinite 845 applied?
Most might say and disagree what I'm about to say, that Iron-X will come along and strip the 845, but of this I am not so sure, 845 is some pretty durable stuff. I would assume in the full absence of a protectant, the Iron-X would probably do its job better.
But since you say you will first foam, then wash, this might be fine. When I once used Iron-X, I did have both Wolfgang Deep Gloss Paint Sealant 3.0 and Menzerna Powerlock on the vehicle at the time, and it appeared Iron-X worked fine, and did its job beautifully.
As for me, I'd probably address first what I assumed you probably meant to say as "the wheels", (Not tires)
That after de-conning the wheels, getting them done with the Iron-X-etc, then I'd move onto the rest of the truck with the Iron-X.
Reason I say this, is that Iron-X must sit, and do what it does, and there's a close time frame from that process to where the solution can start drying upon the paint, and you don't want the Iron-X Solution-Slurry to dry.
When I used Iron-X, I had a bucket of clear warm water, and a well dampened squeezed out soft sponge, and some like to also use a soft small MF Towel for spreading. Apply-2-3 spritzes of Iron-X per panel, or a few per 1/2 of the hood or roof, then spread thoroughly with a very damp MF Towel to distribute it. You do not have to coat entire panels with the product, and to do so, you will then go through a lot of product quite quickly.
As for the need of a Glaze between polishing and sealing-waxing again, that will be your choice, but it may not be required. Unless the Glaze you speak of is Wolfgang Finishing Glaze, which is not actually a Glaze, but an ultra-fine Finishing Polish.
If you finish down totally mar free with the polishes and pads you have on hand, I might be inclined to skip any true Glazes, but that can be a personal choice.
