Underhood painting/electrical advice?

[captain_morgan]

I've got a 72 swb (non A/C). I've blown the motor up in, so while it's getting rebuilt I thought I would spend some time under the hood cleaning things up. The wiring harness had a mile of electrical tape on it, and 4 WIRE NUTS. Also, why the motors out I thought I would also paint the fire wall and inner fenders.

I guess my questions are......
-What have you guys done with the harness where it attaches to the radiator support? I don't like the look of the original plastic wire holder on the support or the one on the top of the firewall.

-What do I paint me master cylinder with? I painted the brake booster with gloss black krylon, but if brake fluid gets on the m.s. it will peel right off, right? Someone suggested brake caliper paint, but...?

Thanks in advance.