I've been a long time lurker on this forum and I'm looking for some assistance. No matter what I do, my doors will not stop chipping. I've sanded, degreased, primed (3 coats), painted (4 coats) and no matter what I do I cannot keep the doors from chipping. I have the factory mud flaps currently installed, but they offer little help. Is there anything tougher I could paint it with? I've been using an enamel paint so far and it only lasts a few weeks before looking terrible again. I'd post pictures, but my phone doesn't like photobucket or this forum. The truck is a white, 2002 Mazda B3000. Thanks!

 

You can try a clear coat but physical debris hitting paint at high speed can cause chips.

Example of clear coat here: 3M Paint Defender Spray Film - AutoZone.com

If you have wide tires then extended fenders may be only or better option.

Seen here: http://www.partcatalog.com/ford-rang...er-flares.html