Ive got a 2007 chevrolet monte carlo lt, with a 3.5l FF V6. i bought it just under 2 months ago and ive been wanting to fix an aesthetic issue it has had since i got it. The rear fender lips are slightly rusted out, and theres a dollar coing sized dent in the passenger door with all the paint flaking off around it. Would fixing these issues be as simple as applying rust inhibitor, filling them with bondo and painting them? Or would i need to take steps in just replacing the door and panels altogether? Ive been holding off on this until now because, it being a unibody with much larger panels than a typical vehicle would make the latter option much more costly, but ive also never used bondo, or painted panels on a car and dont want to mess it up sorse than it already is. Plus with winter coming it would be awesome to stop the spread of the very little rust this car has