I would be wary of clay bar on the stripes and definitely NO WAX !! Remember, these are textured vinyl (3M 1080 series wrap material).
Mine were a mess on day 1 and I almost yanked them off. I have found that if you clean them following 3M's recommendations, then apply 303 protectant they come out looking 'even' with no blotches & are good for at least a few washes.
Apply the 303 sparingly to a MF covered sponge (helps get even coating into the nooks & crannies) and gently work it into the stripes. After doing the whole car, take a clean MF sponge and gently wipe in 1 direction to eliminate any streaks or excess 303. Store both sponges in a ziplock baggie, they will remain moist and can be used without adding more 303 for quickie touch-up as needed.
And as mentioned above, be careful on the bumpers as they are a 2 piece application with overlap (not end butted) and tend to start lifting on the corners if rubbed too hard !!