We are fortunate in having black tops, since the dirt really doesn't show. I think, Butek, you'll just have to see how the top performs for you in that respect. Having a lighter top very well may need more washings/care than our tops. I haven't used the products recommended by Ford, but I think if I was lucky enough to have a PCR, I would pay more attention to the care of the top, and follow their instructions. That way, if there is a problem down the road, and it may possibly still be under warranty, it's their problem, not yours.
One thing I highly recommend, is making sure the top is totally moisture free before putting it down, and especially before putting the
hardtop on for extended periods, as there have been reports by some owners of some sort of "stain" on the soft tops after being "stored" under the
hardtop for a period of time. This problem could be caused by either the
soft top still being damp, or possibly a leak in the
hardtop seal. I would also recommend periodically removing the
hardtop when it's on for extended periods, and checking the
soft top to be sure there is no "staining" damage. Of course, the less the car is exposed to rain/washings during these periods, the less chance there is of this problem occuring.