I'd seriously consider taking him to your vet.
In the meantime; what are you feeding him? What type of bedding are you keeping him on?
There can be several causes for "scabs". One (and the most often I see) is too much protein in his diet. Another cause could be lice or mites. I also see unsanitary conditions, irritation to the bedding and allergic reactions to a food. There could be dozens of causes.
I'd start off by looking at the amount of protein you are giving him. Then, I'd give him a bathe in warm water, using something like baby shampoo or dog shampoo for sensitive skin. Go down to your local vet and pick up a tube of Advantage Kitten (topical). Use a tiny drop between his shoulder blades. This will take care of any external parasite he might have. I'd also consider changing his bedding to fleece or flannel until he gets over this problem. It wouldn't hurt to take a bit of bread and dip it in a small amount of olive oil and give to him to eat. This will help with dry skin.
Also, don't forget to clean and treat the wounds, but wipe off anything excess as he'll clean it off himself. I'd use a iodine rinse right before you wash him with baby shampoo. Remember not to give him a bath more than once every month or two though, this can dry out his skin. After the iodine rinse/bath, I'd use a Q-tip to apply the medicine after that.