Seatbelt mounting threads

My 7/16ths tap arrived from Ebay this evening, so cleaned out the seatbelt threads.

WD40 to lubricate, care/paranoia about cross threading the tap, and an adjustable spanner cleaned them up nicely. The inboard ones seemed to be heavily powder coated, this process seems like a must process rather than an option:

Before:

After:

I only need 2 taps for the project, this one and one for the front top balljoints, so no full tap kit. Adjustable spanner has to do. Half turn forward, quarter back & WD40, taking it slooow:

Inboard mounts clean: