There are a number of paint removers and strippers out there that will do the job. All kind of messy. The lye-based ones will make the pair slough off without harming the plastic (always test first though) and it will look more original even if you have to hit it lightly with black. 

Jim

> On Sep 20, 2017, at 10:45 AM, "ddbjorkman@verizon.net" <ddbjorkman@verizon.net> wrote:
> 
> And just how would one go about removing the brown paint without harming the plastic?
> 
> 
> -----Original Message-----
> From: Jim. Felder <jim.felder@GMAIL.COM>
> To: vanagon <vanagon@GERRY.VANAGON.COM>
> Sent: Wed, Sep 20, 2017 11:08 am
> Subject: Re: turning brown to black
> 
> That krypton plastic paint is very good, I have used it on my grill for
> years. If you strip the paint off your grill it will be black underneath
> tho
> 
> Jim
> 
> On Wed, Sep 20, 2017 at 10:05 AM ddbjorkman@verizon.net <
> ddbjorkman@verizon.net> wrote:
> 
> > I have to replace my front upper grille. Fortunately, I have a spare
> > grille, but it is brown and I need black. What's the list got to say about
> > best paint for plastic. I know Krylon makes a good product that has worked
> > well on my lawn furniture, but I don't know how it will work under
> > automotive conditions.
> > BTW, I replaced my A/C condenser after the SC crash with a GoWesty
> > condenser made for modern refrigerants, and it sure seems to work better.
> >
> > Dave B.
> >