E30 paint hammered effect?

[onthames]

The area in red is what I'm interested in. I presume everyone else's is like this, but this area has a pitted/hammered texture on the paint.

I also have it on the area below the back bumper
Firstly, is this normal, secondly how do I achieve this effect or is it the actual metal below that's pitted?
Basically I was adjusting my rear bumper today (moving the clips to get a better fitment) and when I put it back on one side jumped off the rail and caught the area below the bumper on the way down taking away a bit of paint, see below:


Also, does anyone know of any single stage paint (paint + clearcoat together) for diamond black (code: 181)?

[flybynite]

The area in red is what I'm interested in. I presume everyone else's is like this, but this area has a pitted/hammered texture on the

That is the factory stonechip coating which is then overpainted. You can get the same finish with something like Gravitex or 3M 08800 but it takes a bit of practice to get it looking OEM

Also, does anyone know of any single stage paint (paint + clearcoat together) for diamond black (code: 181)?

Solid colours can be single, Metallics are base and clear. If you are just touching up to stop rust then some sprayed base coat is fine.

[onthames]

Cheers, good info