Can you help me figure out wich tecnique is this?

[Aenhimal]

Hi! Few months ago my brother gift me this drawing (he bought it at the Balear's Islands, here in Spain, they told him wich tecnique was but he doesn't remember, great..), and since I still having no clue how was it done I decide to make some photos of it and ask, It looks like if it is paint on a metal support, maybe aluminum and when light "touches" it is like if it begins to shine, and it kinda changes depending where the light came from.
If anyone knows the tecnique, would be great, I would like to know more about ir, thanx.

[TASmith]

Looks like Acrylic to me.

[timpaatkins]

I COULD be Iridescent acrylics, but i doubt it would reflect that much. Is it an original drawing/painting? Or is it coated with something"

[PsiBug]

Is it only the rays of light that look metallic or the whole thing? Since it's painted on metal, it could certainly be metal with a clear glaze over it (for the amber color of the light rays and then everything else (except the rays) painted over with acrylics.

[Dilated]

FUCK YEAH
TIGERS IN SPACE
just when you thought space had no predators

[PsiBug]

I, for one, WELCOME our new cosmic tiger overlords!

[Aenhimal]

timpaatkins: I didn't even know that Iridescent acrylics exists, on my next trip to Madrid (I live in a really really small city, our stores are not that cool) I'll try to buy a few just to check out how they look on a paint.

PsiBug: it's the whole thing but obviously the lighter the colour is (white, yellows, oranges,..) the shiner

Sketchz: haha, I love your comment, I guess that's why the second tiger is looking at the first like, WTF! what are we doing here?

PS: Happy Christmas to all :P

[k4pka]

Is it one of those crazy scratch through thingy-whatsits?

[Black Spot]

Is it one of those crazy scratch through thingy-whatsits?

Scraper board? That was my first thought too.