@a,b; did you have that before or are now only reading? A scrub in TH usually means they go with a kind of sandpaper over the skin to remove dead cells etc-this will not make your skin younger.
IN fact I think you should not combine this with s..x, will only lead to disappointment.
Thai msg as such: it is skin on skin, you wear a kind of hospital gown, and it does indeed include lots of stretching, knacking, twisting. IF it really is done by a good and well trained one, they should ask first how strong you want it-and even show what they think is ´strong´ (grip, to avoid any misunderstanding). A well done all-body over will take some 2hrs. Of course you can ask for only some parts etc.
No exp. myself at all with this for the blind, as a general rule they tend to get good reviews. I think you may be better off with what hospitals offer in this, but those better acquainted with Pty will perhaps know better. Borders more on what fysiotherapy does in the west. Many of them also get the senior citizen reductions (in home country).
Your ideal will need 2 separate treatments-wow- double time in heaven! (or well, hmm, still maybe half). The tipical msg guys from the HE-shops will not have much exp. with this.