My wife and I just purchased a new Bighorn 3760el. We want to purchase some cleaning and polishing products for the solid surface counter tops in the coach, but don't know what the counters are made of. We don't want to apply the wrong product, so please inform us what the counters are so we can purchase to right product. Also I would like to know what the (EL) means in the model # 3760el......Thank you