RE: [A/S] Need to remove "Chinking"

[rj.dial@xxxxxxx]

Yep, a license should be required to apply sealant - some people just 
don't understand the concept.  
Best results I've seen is to chuck a 6"-7" buffer pad into a low speed 
drill motor and use a coarse polish compound such as NuVite G-6 
(http://perfectpolish.com) or some of the trucker stick rouges and 
grind it off.  Works on Vulkem (Polyurethane), Silicone and latex 
caulks.  Sounds like your stuff may be something like Gutterseal, or 
maybe sealant that someone tried to polish - it gets a dark gray when 
you do that.
Best of Luck,
RJ
'65 Caravel
'57 Flying Cloud
VintageAirstream.com