Ave!
I've used both , and in all honesty, Both are good products.
for me it all depends on the original patina. I'll used jax brown on the desert patina coins ( sand with black patina ) and can usually get excellent results. This Jax will turn the spots black
dellard on the coins with brown or green patina .
it takes a little longer to restore the damaged area with dellars, ( not just the dip and rinse like jax ) but I'm never in a rush. and the results are excellent and will give a nice brown coating to the damaged area
hope this helps
cheers
Good call, Johnny!
The four JAX Solutions (Brown, Brown/Black, Black, and Green) can all be used singly, or in various orders, as a quick fix for
patina issues.
Dellers Darkener is another story. In most cases, as Johnny mentioned below, it's a slow worker that seems best on green
patina coins. The Deller's rub will darken the green
patina and brass-showing bits, but it takes a day or two, to several weeks in certain conditions.
I've
had good luck by placing Dellered coins in bright sunlight. Check the coin daily,
flip to either
side. If the
patina look dry, apply more Deller's, repeat until the coin's surface remains shiny after a day or so, and the shiny bits are repatinated. Make sense?
Best,
Kevin