Trim protectant

[lytefall]

I am using protectant 303 currently as my trim protectant. I used it for my truck tonneau cover and trim and it always worked well and kept my plastic and rubber trim pieces looking like new. My new car however has weep holes in the doors and hatch that weep slowly over time due to their design. I think it erodes the protection away slowly and a day or two after detailing I have white streaks down the plastic trim underneath both doors. Even if I clean and reapply I still see a faded line of where the "stain" was.

Obviously I can't plug the drain holes to stop the slow drainage so what to do?

Any ideas?

Thanks in advance.