Hello, everyone! I'll say right away that I'm not very familiar with 3D printing, although I have worked with plastic. I'm more in the metalworking field. So here's my idea: printing a 3D object with small holes inside, possibly in the form of a mesh or hexagon. Creating such a micro-porous structure with the smallest possible gaps. Then cover this structure with liquid metal, the main thing is to use plastic or print settings for better adhesion.

After all these procedures, you can start galvanizing the part. For example, using chrome or copper. This will make the structure stronger and, in theory, able to withstand high temperatures and pressures.