I tested out Preachers process on using rice in a baggie today. Worked most excellently!
I bought a 1lb bag, but it only covered 5 lanes of the 6 lane track. So I transferred it to a gallon size baggie. After folding the bag over to be about the same size as the original bag - I removing the air and sealed it. I then wrapped it in a microfiber towel and laid it across all six lanes. As such, it has about a 1/2 inch overlap to the outsides track. The best part is I get no kick back at all!