Multiple marks on a path

Question

I want to add a multitude of marks to a single path. However, sometimes these marks are heavily misplaced. For example, the blue arrows should be a little bit ahead of the red ones.

\begin{tikzpicture}
    \draw plot[smooth, tension=.7] coordinates { (5*0.02109, 5*-0.12607)(5*0.2274, 5*-0.1806)(5*0.4037, 5*-0.02751)(5*0.536, 5*0.4091)(5*0.768, 5*0.2045)(5*0.7262, 5*-0.02055)(5*0.8538, 5*-0.1366) }
        [postaction={decorate}, decoration={markings,
            % Red arrows
            mark=between positions 0.1 and 0.9 step 0.25 with {\arrow[red, line width=1mm]{>};},
            % Blue arrows
            mark=between positions 0.2 and 0.9 step 0.25 with {\arrow[blue, line width=1mm]{>};}
        }]
        ;
\end{tikzpicture}

Answer 1

Ryan Reich's (thanks!) comment was the solution: multiple postactions. Note that every "decoration block" needs its own decorate postaction.

\begin{tikzpicture}
    \draw plot[smooth, tension=.7] coordinates { (5*0.02109, 5*-0.12607)(5*0.2274, 5*-0.1806)(5*0.4037, 5*-0.02751)(5*0.536, 5*0.4091)(5*0.768, 5*0.2045)(5*0.7262, 5*-0.02055)(5*0.8538, 5*-0.1366) }
        [postaction={decorate, decoration={markings,
            % Red arrows
            mark=between positions 0.1 and 0.9 step 0.25 with {\arrow[red, line width=1mm]{>};}
        }}]
        [postaction={decorate, decoration={markings,
            % Blue arrows
            mark=between positions 0.2 and 0.9 step 0.25 with {\arrow[blue, line width=1mm]{>};}
        }}]
        ;
\end{tikzpicture}