Removing old wax

[Ghoste]

Especially the stuff on the edges of the cowl vent.  Is there a good way to get it off?

[myk]

I had my Charger detailed this afternoon and the 'tech had to deal with my sloppy waxing that has wax in all of those hard to reach places.  I think he used rubbing compounds, brushes and a lot of profanity to get just SOME of the residue off...

[Ghoste]

That doesn't sound fun.  I was thinking of trying something like naptha on a cotton swab.

[bill440rt]

That'll work. Or you could try using some detailer on a swab or rag also. 

[b5blue]

An old electric tooth brush? 

[Ghoste]

Would a clay bar work on old wax?

[myk]

The more aggressive clay bars might do the trick, but then I'd be worried that it'd be taking off too much paint as well.  Your paint doesn't have a clear-coat on it, right?  Well, I guess it doesn't matter-that excess wax isn't on the main surfaces of the car, right?

[Ghoste]

The white buildup on the black paint is pretty noticeable whether its the main surface or not. 

[bill440rt]

A clay bar will not remove paint. Surface impurities, yes.

[Ghoste]

So it could work great on old wax then?

[bill440rt]

Hmmm... it might!
I would try some simple detailer first with a swab, soaked on a rag, etc. 

[73rallye440magnum]

New wax works really well at removing old dried on wax 

Be sure to remove it all this time!

PPG DX394 works well in those hard to reach areas. Use q-tips or microfiber towels.