yes the surface does matter. you try and piece on a bare concrete wall and see if half ur paint doesn't get sucked up even if your using the good stuff. btw-i started making stencils and i gotta say its pretty awsome.
theres nothing like when the city paints over a wall in pure white paint. its like giving me a canvas in my favorite spot every 2 months.
hahahah, this amazing stop near this park got painted over green, 2 days it took for SYMOFORE to full paint it. the guys nuts..
worst then wood is mad rusty metal or ondulated metal. or that wall with a random fucking nail sticking out and u snag your hand on it. i love plastic as well for quick shit, for mad detail i like a fairly recent unprimed cement wall.
i'd be happy if i even had some of those things to paint...but since i get frieghts the most, frieghts it is...