They may slow things down, but rust continues its ... To make the repair almost invisible, after a few days, apply and work in a small dab of regular car wax to smooth out the touch-up.
If your car faces any damage, be it a minor scratch or a serious collision, you will need to understand the repair process.
The Family Handyman on MSN7d
How to Repair Chipped Car Paint
The paint chip shown here should have been repaired long ago. The metal inside the chip has begun to rust and lift the paint ...