I have this problem, i have taken off the plastic trim around the arches and i will be leaving it off as i think the plain metal looks better, the plastic side skirts are staying but i am fitting new ones. I have two new arches to fit and when i went to take off the old rusted one i noticed you have a few bolts under the front bumper, so i am guessing this will have to be removed to get to them. let me know how it goes incase there is any problems i may face. I am fitting a Vento front end so probably be changin the arches as i fit that.