This is a, I think a Mark 7 or maybe a Mark 9 rear quarter
It's got 40 years of humidity left on it. We'll try a spot here with the phosphorous and we'll try a spot here with the muriatic
So I take paper towels. We're just going to dump it on the paper towel here
We'll get a nice breeze here because it's blowing any fumes away
A little navel jelly over here. Keep it nice and thick like this
And let's take this phosphorous off first. It's loosening up the rust
The phosphorous is biting it off. Now we'll take the muriatic. Look at that
That muriatic's got a bite right back clean. You can see how much it removed
Look at that. Let's try the navel jelly. See if we can get any metal to show. And there's the results in the navel jelly
So the winner here between phosphorous, muriatic, and navel jelly, muriatic by far