Advice on transferring technical drawing/line art to dark paper, possibly metallic or white lines
Look around the city you live in for a MakerSpace or other tech-tools club.  Such places often have tools which would be prohibitively expensive for an individual to own.  As a one-time visitor or for a small membership fee, you might get access to any of the following tools which would assist in your project... 


A Laser Cutter or Laser Etcher
A photographic-quality CNC Machine
A Vinyl Cutter (to create a stencil over which you can apply metallic paint)
A Photo-Etching Rig (to create a better stencil than vinyl)
A large form factor Laser Printer to use with the foils which @fred_dot_u suggested.


Such equipment might also be available at a local university or even in the public library.