It's possible, but it may be more trouble than it's worth. Your camera is not really built for using lens filters. You'd have to rig something to hold the filter and then you'd have the problem that to use a polarizer effectively, you really want to use an SLR, because you want to look through the lens and see what it is doing. I'm not sure how well the viewing screen would work for this with a compact camera, so you'd probably have to take a lot of photos, adjusting the polarizer by increments, in order to just happen to get one with the polarizer in the right position.
I'll think the results of the polarising filter will be easily t to bee seen on the build in monitor. For important sections you can zoom in typically. I'm using most of the time the optical viewfinder on my Pentax K-5 but I also did seveal photos with the live view and the polarising effect is clearly to be seen
According to the BHPhotovideo page, the A300 filter system should work for that camera model. It looks a bit hokey, but it should work. The main downside is that you have to be careful as they can add an extra reflective surface because they don't mount directly to the lens.