260Z NP and warning valves

So, I'm getting back around to finishing the brake project that I started oh so long ago. I'm going to clean out all the lines and everything, and I'm wondering how I need to clean the proportioning valve and the fault warning light switch. Should these just be blown through with compressed air and isopropyl alcohol or do they need to be disassembled? If so, are there replacement (rebuild) parts available?