Yes I agree... I'm referring to the bumpers in question. I find Trim Restorer works well on grained trim yet on cars such as my GTR and a couple of 206's in the family all with very smooth plastics, the Trim Restorer doesn't excell..... The GTR works well with the Clearkote, whereas the 206's work well with both the Clearkote and the Duragloss ... The Duraloss and the Prima Nero also work well on more grained trim, such as what fords are in the family, and a Jag...... But, with the Prima being waterbased I don't think it will be best suited for this task as a deeper clean is needed rather than just a dressing.

Cheers.