Car paint scratches and scuffs will reduce the resale value of your car. If you put off repairing scuffs, scrapes and small dents it is likely that corrosion and rust will occur. You could end up with heavy repair bills in the future. Graffiti, scratches caused by overhanging trees, bird dropping can all add to reducing the value of your vehicle.
Moreover, if you use the traditional body shop the repair bills will be a lot higher and you will need to claim through your insurance company. It is likely you will lose your no-claims bonus which means your future insurance charges will be higher. So, it makes sense to look after your car which after your house is probably your most costly asset.