The only place I've ever read questioning low porosity hair and protein is on the texture/porosity page on nc.com, which is why I don't give out that link.
My fine/low porosity hair never met a protein it doesn't like. I do at least on PT a week and use a lot of products with protein.
I usually use moisturizing PTs like CJ Repair Me or SS Protein Repair, so I don't need to do a DT when I'm done. You can also do the Gelatin PT that IAgirl posted, you'd have to search for that.
Other then gelatin, I don't usually do the food PTs like egg, mayo, amino acids, yogurt, etc. Can't stand the way my hair smells after a lot of these.
3a (Corkicelli), highlighted, fine, low porosity
modified CG, since April '07
CG since 3/11/08
HGs: Curly Kinks Satin Roots, Curlycue ReNew and Coil Jam; homemade FSG and okra gel; soap bars; DM MiraCurls Curling Gelly; UFD Curly Magic; Shescentit LIs; Sevi conditioners; Botanical Spirits Puree, CJ Repair Me