Re-blacking the numbers on a steel rule

[cami]

Just clean the high spots and leave the rust and crud in the markings. There is enough contrast if you have good light where you work.

[philip in china]

I used to use whiteout when reconditioning safes. It brings out the numbers and indices on a combination lock.

[jimbob]

I already used the gun blue ...I'm looking for a 6 foot rule I have to try the white out on.

[steponmebbbboom]

wouldnt white-out pick up every fingersmudge and bit of coal dust and just turn black anyway?

[jimbob]

Originally Posted by steponmebbbboom

wouldnt white-out pick up every fingersmudge and bit of coal dust and just turn black anyway?

I think that your right but I think it would act as a primer to help the dirt stay in the groove.