Ok, I am fairley new to quads, but have been around mini-bikes and motorcycles for 30+ years. What is the deal with sanding all the plastic body parts??? Two of the quads that I bought used, the p.o. has taken sand paper and sanded all the plastic

. Was this done to cover bad scratches? The plastic is not cracked, just sanded. Sure makes it tough to keep clean, Every thing wants to stick to it, mud, dirt, grease. I have sprayed the entire quad with ArmorAll, but this is a short term thing as it only lasts the first mud hole.
So, can some one tell me why this was done? Inquiring minds want to know!!