yes you can put MK over MK

film over film
bubble gets trap between layers.
you'll have to go back and poke needle to get
the trap air out.
on solid sheeting it's not that hard..but on open
bay ..like between the ribs it's a little trickier.

i use MK as base color then use lower temp film
like econokote, tower as trim. it's a lot easier.
you don't have much of a selection on colors but less bubbles.

neon sticks without heat.lol

you can also use trim sheets.. they're like decals.
when applying decals use windex or something.
this way you can slide the trim around and not to get it right
the first time. use a squeezgie to get the windex off as much
as possisable

seal or ca the edges of the design so your work hard work
don't fly away.

i tried using solvent with film...no dice.
the scheme gets wrinkle and you can iron it out