Can ABS or PLA plastics be cast?

Im quite interested in 3d printers but have no idea if a regular ABS
or PLA plastic can be “lost Waxed” with good results, if any one has
experience it will be very welcome, I do a lot of casting in silver
and some gold to but always from wax and sometimes organic matter as
wood ,paper, insects etc. thank you all.

Yves Roldan
Tepoztlan Morelos Mexico