I usually use IAGirl's PT recipe for my weekly PT- I sit under heat for about 30 minutes, then follow with a DT. In a pinch I use Aphogee 2 step (IAGirl's recipe was designed to give very similar results to Aphogee, which has a very strong smell).
Prior to trying IAGirl's PT, I tried (in order from what I felt was weakest to strongest)
GVP Reconstructing Conditioner
Giovanni Hair Reconstructor
CJ Repair Me
I now use these other products as my RO once or twice a week (I blend with a regular moisturizing conditioner to get my protein and moisture in one step- I normally mix with GFTN). I also added ION Effective Care in the protein RO rotation. Typically fine hair can handle (and likes) lots of protein.
3a/f/iii Before the chop- Donated to Locks of Love, January 2013
Modified CG since 11/5/11
CO-WASH: VO5 Vanilla Mint Tea Clarifying, DevaCare No-Poo
CLARIFY: CHS Treatment Shampoo (used prior to PT/DT)
RO: DevaCare One Condition, Regis Olive Oil
LI: Cure Care, As I Am Leave-In
STYLE: Re:Coil, Curl Keeper, Biotera Gel, Deva Ultra Defining Gel, GVP Liquid Sculpting Gel, Curls Rock Amplifier and Strong Hold Mousse
PT/DT: IAGirl's PT, One n' Only Argan Hydrating Mask