Anyone know if these are the same concentration? They're both the Uschi track burnishing fluid rebottled, the bottles look identical, but the AK variety recommends diluting with equal parts water, while the Ammo version says to use it neat. Has anybody compared the two to see if they blacken to the same extent? The last tracks I did using diluted AK fluid and they came out OK (dark enough but the stuff doesn't seem to give quite the same brown-black shade as, say, Blacken-It, being more of a straightforward blackening) but with the next runs of tracks I plan to do being done using the Ammo branded stuff (because the LHS had a decent price for it) I'm curious as to whether it's exactly the same, or is cheaper because it's more dilute to start with - which'd mean that diluting it would be a bad move because it'd probably be too weak.

Anyone know for sure? On the same subject, anyone know if Blacken-It is still made, or if anybody sells the basic chemical mix in bulk? I know it's toxic as hell (due to selenium, if I remember correctly) but while the AK didn't do a bad job, it didn't work *quite* like Blacken-It used to, in that there was no precipitate formed during the chemical reaction - all that really happened was the blue faded as the liquid "wore out".