Jan 2019: I got hold of the new Neatlac (waterbased) and so I have started to test to see if it lives up to the quality of its obnoxious, but good quality highly used, predecessor.
So [A] I used it on Eco-Flo Water Stain. It made the color pop beautifully, but arrow  and arrow  shows that you should not let it pool anywhere (I put it on liberally so that it would pool so that I could see the effect).
In [B] I used it as a resist under Eco-Flo Hi-liter - worked very well as a resist (in all of these tests I only used 1 single layer of Neatlac).
Piece [C] was first stained with Eco-Flo Hi-liter, and then the Neatlac was used as a sealer over it (also used as sealer on piece [B] ).
Arrow  shows a spot where the brush did pick up the stain - so I am going to stay with LeatherSheen from a spraycan to seal in any antique stain. My friend Jim Linnell showed me how to put a sealer like this on with a sponge: you simply work it until it is even - the sponge will pick up some of the antiquing, but you just keep working it until it shows even.
The difference between the light and dark indicated by arrow  is merely a border between more and less oxidation - the Neatlac had no effect there. In the second photo, the arrow shows a border between Neatlac and no Neatlac - [a] has Neatlac as a resist to Fiebings Antique Paste, and [b] has no resist.
So it looks like Pro Resist by Fiebings is a better resist for its own paste.
Piece [c] simply had Neatlac as a topcoat over the natural leather - no color - nice and shiny. I think with practice and more experiments this product might just be as good as it was when it was still a bit poisonous many years ago.
First published Jan 2019