I agree.  Give it a shot.  You CAN slide aluminum and regular steel.  The problem is that it is soft.  When you land on it, your edges can leave big dings.  Then later your leading edge hangs up on it and you get pwnd.  It really depends on how wide it is.  Rubbing wax on it will help prevent your edges from tearing it up somewhat. Cold Rolled steel is what the parks use.  It is harder and doesn't get dinged up as much.