I've taken on minor repair work. For those who have not heard the story. When I purchased my car I had a fog light assembly replaced due to cracking plastic. The idiots at my dealership tried to screw the assembly into the bumper through the oil cooler opening front the front. My guess by using a ratcheting angled screwdriver. By doing so they scraped up a couple spots that was irritating to me. One divot just below the lens and the other way to the right were they must have rubbed the ratchet.
So, that combined with another quite large divot from a rock near the emblem, many minor repairable chips, and light swirl marks led me to this process.
1. Clean and prime divots using a small bottle of primer/filler with brush.
2. Paint with OEM Mazda Velocity Red touch up.
3. Wetsand smooth.
4. Poorboys SSR2.5 with PC cutting pad
5. Poorboys SSR1 with PC light cutting pad.
6. Poorboys EX-P Sealant
7. Poorboys Natty's Paste Wax blue
I only used primer in 3 small spots on the bumper. You can buy a small brush in a bottle of primer/filler at the auto store. First I cleaned the marks with a toothpick. Then with a tiny piece a 2000 grit I lightly wetsanded the area. Then applied the primer with thin coats. Let dry (time depends on temp and humidity). Then lightly wetsanded smooth, following painting with light strokes. That's the basic technique. I experimented to see what worked best. Note that if you see black on the bumper in your chip marks that you will have to use primer as the paint is very thin and you will only fill the hole, thus still see the black under it.
Here's the damage to fog light area. Note I had used another shade of paint to hide the damage temporarily.
Cleaned and primed.
The divot. Cleaned out and lightly sanded.
Primer filler completed.