Digital BW, The Print

Been wanting to experiment with wax, on my Photo Rag prints, and I 
just went through all the previous posts I saw. My objective is 
primarily visual.  I want a deeper Dmax, and overal Deeper "look".  
The added protection is welcome as well.

1. Renaissance Wax:  Never used it on prints, but I have used other 
waxes that are similar for woodworking, and I DO suspect that it 
would be a "pain in the butt" to use on prints.
2. Liquid Acrylic Wax:  this actually sounds quite plausible to me, 
and sprayed, should be easy enough.  Problem, water soluble
3.  I have tried Clear Shield (Semi-Gloss),,, not bad, easy enough, 
but it does little if anything to increase the D-Max,,,and, again, 
it's water soluble

So, I am looking to experiment.  Now, one wax I am very familiar 
with, it's tough as nails, seemingly doesn't yellow or anything 
along that line, is car wax.  The typical creme wax that comes in a 
short can (Turtle wax for example) that you apply, let dry 
(thoroughly) and then buff off the dried remains. Naturally, this 
wax, as with any wax or varnish, I would try on top of an isolation 
coat, such as Lascaux Fixative.
So, any opinions/experience using car wax? Curious to hear. 
Archivability issues????
All the best,
Kevin Logan