I would not spend a cent on the frame set. Not that there is anything wrong with the frame other than it is entry level and very big. Both of these factors, particularly the big frame thing will lower the value of the bike.

A rattle can paint job and a set of decals will set you back a hundred bucks or more. And, you will spend a considerable amount of time and mess completing the work. And for what? You will still have an entry level road frame set that is way too big for most people to even consider buying.

Were I you, I would offer the frame set on Ebay for $9.99 US and hope that at least two big guys really want it.