Capt. Frank Hopkins wrote:

It sure will! Muratic acid will also eat up almost anything else too.
Further, I am not sure what kind of reaction you would get when
introduced to copper bearing paints. It could prove quite dangerous, or
at the very least, incendiary.

Unless there is something else reactive in the paint,
nothing at all will occur as a result of HCL contacting
copper. HCL is a solvent for Cu oxides however.

Rick