flexible arches and inner front arches

just fitted flexible arches on and on the front the inner plastic arches are showin on the front of the wing do you completely remove the inner arch or just cut the front bit that's showing?

My front inner plastic wings I ripped out, it only allows mud to trap underneath and rot the wings. Take the wing panel off, weld what needs welding, prime it, paint it and waxyoyl it then rip the plastic bit off the wing panel, stick the panel back on and then you can jet wash it all clean when needed and it wont rot as easily