The Salafis don't do Rafal yadain after the third Raka'at rather they do it after standing from the Tashahud of the second raka'at before beginning the third Raka'at. Here is the Sharah of Umdat al ahkaam of Imam Abdal Ghani al maqdasi al hanbali rahimahullah in which he has given the same opinion. Refer to page 31 here http://www.islamlecture.com/documents/salaat1.pdf