BMW M Perf spoiler and splitter fitment questions

[wcw]

On the front of the car where the CF pieces are it's apparently a common issue that they're not completely flush with the body. Those of ya'll with this what did you use to close/seal up that gap?

Also, on the spoiler on the trunk...there's a small gap (i'll see if i can attach a pic) where the leading edge of the spoiler isn't flush with the trunk. Any suggestions? My concern about front and rear is road debris getting stuck and either making the spoiler come up more as well as the CF splitter pieces.