A quick google search brings up Rapid Prep Wax to remove Silicone. 

----- Original Message -----

From: "Jeff Palmer" <jpalmer@MYMTS.NET> 
To: "List, Vanagon" <vanagon@GERRY.VANAGON.COM> 
Sent: Tuesday, September 23, 2014 9:01:52 AM 
Subject: Re: Rubber 

Bears. 
http://www.winnipegfreepress.com/local/Polar-bear-exhibits-underwater-tunnel-temporarily-shut-after-bears-chew-into-silicone-275805581.html 

> Date: Mon, 22 Sep 2014 20:39:55 -0700 
> From: vwrobb@GMAIL.COM 
> Subject: Re: Rubber 
> To: vanagon@GERRY.VANAGON.COM 
> 
> What does remove silicone? 
> 
> Rob 
> vwrobb@gmail.com 
> 
> 
> At 9/22/2014 08:23 PM, Karl wrote: 
> >Of course not. If anything it spreads it around more. 
> > 
> >On 9/22/2014 10:48 PM, PSD wrote: 
> >>Lacquer thinner doesn't remove silicone? 
> >> 
> >>-----Original Message----- 
> >>From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of 
> >>Karl Mullendore 
> >>Sent: Monday, September 22, 2014 9:52 PM 
> >>To: vanagon@GERRY.VANAGON.COM 
> >>Subject: Re: Rubber 
> >> 
> >>If anyone ever has to do any paintwork to this vehicle you will hear them 
> >>cursing for miles. Silicone is the worst thing to apply anywhere on the 
> >>exterior of a vehicle, unless of course you have no reason to ever paint it. 
> >>Some painters might even refuse to touch it. 
> >>