DOT5, silicone brake fluid does not eat paint. Systems on autos change over to DOT5 easily, you just have to 
flush completely. I bet your trailer brakes would change over as well. DOT5 is superior in several ways.
Sam Moore, ’77 Rhodes Continental, Rhodester

> On Apr 2, 2020, at 12:46 PM, Cary Tolbert <retiredtoby at gmail.com> wrote:
> 
> Last season I had my Triad Trailer upgraded with s/s disk drakes.
> When you use the quick disconnect in order to use the extension it leaks a
> little brake fluid. I noticed the paint and primer had dissolved in the
> area of the leaked fluid. I realize now that I should have cleaned this
> area. Water under the bridge.
> So my question is, are there any recommendations on TYPE of primer and paint
> to use that is not sensitive to brake fluids properties? DOT3
> Surely some member of the list has experience with this or something
> similar.
> I know if I had a galvanized trailer this would not be a problem. But the
> trailer is an 86 as is my Rhodes and was painted and repainted ,I'm sure,
> black.
> Let me hear from you Rhodies.
> Thanks
> Cary Tolbert
> S/V Whisper 86