You can deposit mirroring chemicals on any non-metallic surface. Whether you get a reflective coating – a true mirror – depends on several factors.
We have not tried mirroring over every type of plastic, but our tests have shown that
As always, the surface must look like glass if you want the silver to look like a mirror.
Clean the plastic with isopropyl alcohol (rubbing alcohol) and then glass cleaner before mirroring even if it is covered with a protective film.
Spray Silver works better on plastic than Pouring Silver.
Use Century Clear Urethane, not Century Clear Lacquer, to create a clear protective backing for your plastic mirror.
When the plastic is immersed in the mirroring chemicals they can't bead up and roll off. They are forced into even, direct contact with the surface.
Use a 3-D Glass Mirror Kit and pouring silver for small, non-acrylic items
We have instructions for using spray silver to dip larger items on our Dipping Chrome page
Use Wetting Agent to break the surface tension - see the photos below
Before
Water has a higher surface energy than plastic so the water molecules are more attracted to each other than they are to the plastic.
After
Wetting Agent lowers the surface energy (breaks the surface tension) of the water allowing it to flow over the plastic.