....PC, are you using detailer to lubricate synthetic bristles, or natural bristles? ...
I usually use a lubricant on both, but I
always use it for synthetic bristles. They're much more likely to scratch.
Back in the day, we'd use old (soft) toothbrushes or make our own detailing brushes by taking a cheap nylon bristle paint brush, cutting down the bristles to about an inch or less in length and wrapping duct tape around the metal ferrule (to avoid any chance of metal hitting paint). Nowadays I buy detailing brushes. They're cheap enough and easily available from the places I get other detailing supplies.
But I try to use natural bristles as much as possible these days, because they're extra gentle. Of course, being softer they don't remove gunk as readily. And you can't cut them down because much of their softness comes from their naturally feathered tips.
Natural bristle paint brushes work, but they're pricey and usually a lot thicker than necessary. Pastry brushes and cosmetic brushes are usually a better choice. Again, if they have a metal ferrule, wrap them with duct tape.
If you're washing the car anyway you can just use car wash soap as a lubricant.
....I made the mistake of waiting a few days to clean up the residue, after it had hardened. I used the Turtle Wax Black detailer to soften it and tried air out of a compressed air can. It helped but the narrow joints were still a pain...
This would be a good place for teriyaki skewers.
As for product suggestions, unless somebody really wants to get "into" the whole detailing thing, I usually recommend using over-the-counter products like Meguiar's Ultimate Wax or NXT or Mothers FX. They're very easy to use. They're reasonably priced. They work very well. And they're easily available at Target, Wal-Mart or any auto parts place like Pep Boys or Autozone.
pc