Ya know, I was wondering how the TWS&S worked 'cause I wanted to buy some. Now I think I'll skip it. I don't want more streaks on the paint. I've been happy with Meguiar's Ultimate detailing products(Gold Class High Gloss QD, Ultimate Quick Detail, Ultimate Quick Wax) which isn't really a wax. You can put it anywhere(flat black, textured plastics, glass etc.)
NOW, these^^^ are only detailing products so, protection is limited. However, I love the feel & shine especially on BLACK, CHARCOAL & NAVY colors and they streak much less and are way easier to buff out the smudge/streaks, than other detail products on dark color paints.
Maybe due to reviews like this, TWS&S will be on the shelves of BigLot's & OLLIE's(discount/closeout stores) for Cheap in the near future. You wouldn't believe the nice detailing products that I've gotten for $2-$3 on closeout due to lack of sales.