Perfect deck is a dream for everyone. But just like a pet it also require care and maintenance. There are variety of sanders available in market that are used to sand a deck. One can use standard orbital sander operated by hand or any other commercial sanders. You can do deck sanding with either of these sanders and get the good aftereffect if used appropriately. Its all depends on the way how you have used it. Patience is required while sanding, specially in the case of a large deck. If you are using a hand sander then it may require several days of work.