It is worth pointing out that not everywhere that advertises something as "Smurf Poo" is actually the same stuff.
From the toughest buffing bars with a super heavy cut, to super finish bars for a high gloss shine, the bolpol range of buffing bars and pastes are complimented with a comprehensive range of quality buffing wheels and accessories.
bolgers.co.uk
https://
youtu.be/hZSen2d475Y?si=SNVJyKMcfdVd2FCt&t=176
(sorry, owner blocks video embedding, so linking to the 3:14 point is blocked, and BCUK insists on embedding all youtube url links.)
More than one place describes the blue buffing bars as "Smurf Poo", and I remember when people referred to the Starkey Sharp blue compound bars as "Smurf Poo". I don't know for sure whether what is now marketed as Smurf Poo was around then and people were being sloppy calling any blue stropping abrasive "Smurf Poo", or whether the slang term entered use and bolpol chose to use it for an actual product. I lean towards believing the latter.
In the early days of this forum I was much more closely involved with knife stuff (British Blades, meets, hammer-ins, and shows) and I don't remember ever seeing the tubs of soft paste now sold as Smurf Poo, but I do remember the term being applied to Starkey Sharp bars.
Bars must be rubbed vigorously on your strop so that by friction and heat it deposits a layer of abrasive waxy stuff (compound) on the strop. With use, the surface of the compound on the strop will develop a metallic glaze and after a while stops cutting and needs to be renewed. Renewing might initially mean just scrubbing some more compound on top, but will soon involve scraping glazed dirty waxy compound off the strop with a steel edge that you don't care about dulling.
In contrast, Autosol, Tormek paste, and Flitz are solvent based creamy pastes that come in tubes, and dry to a powdery consistency on the strop This makes them easier to renew on the strop and less messy to deal with when glazing happens. The strop can be brushed to break up the glaze and expose the leather again.
I haven't used bolpol Smurf Poo paste, but it looks like a water based version of Autosol etc, with similar behaviour for refreshing. Might have to try some since my 24 year old Tormek tube is almost finished!
Bar polishing compound is easier to deal with for field sharpening since a small piece can be sawn off the already small stick and carried in a micro zip bag or pot. Autosol et al need to be stored in a squeeze tube and are less convenient for travelling, I have tried putting them in film pots and the like, and they just dry out.