On the theme of recommended products, what would people suggest for this thick crud! I really don’t think sdoc will cut the mustard!
you can go from specific expensive stuff to paraffin or petrol in an old kitchen cleaner spray bottle ....and a paint brush
An all-purpose degreaser for general home use called, I kid you not, "Elbow Grease" works wonders on this kind of muck. And is available cheap as chips from the likes of Home Bargains and B&M for around 89p for a 500ml spray bottle.
WD40 chain cleaner. Active agent in there works great and there's plenty pressure in the can too. A firm bristle brush wouldn't be a bad thing to use either. https://wd40.co.uk/specialist-motorbike/chain-cleaner/
Gunk, scrape the worst bits off with a screwdriver to get in the crevices then work the Gunk into it with a small paint brush, leave it a few minutes and rinse it off with a garden hose. Done it that way for 40 years and you can't beat it for speed and level of cleanliness/effort. With the new chain and sprockets, clean the new chain with Wurth dry chain lube to get excess wax off it before use then only lube with dry chain lube and never have the issue again. For the Gunk you need the stuff that smells that comes in a tin, not the plastic spray bottle stuff
I use a lolly stick to scrape off the heavy crud, too soft to damage anything. Then tooth brush and paraffin. Old pair of socks or undies to wipe clean Note make sure undies are clean.
Dig and scrape out what you can easily with plastic or wood blade and hit it with degreaser in a pressure pack like you'd get from a hardware or automotive accessories store. Use the degreaser to soften and crud off and a paint brush or your blade to agitate or scrape the more stubborn crud. You've not got a lot to remove there. I've purchased bikes which have had a centimetre of build up in front of the output shaft sprocket.....
Always wipe off with a pair of silky knickers. I use the wife's when they are not being used as a one piece bike cover.
Mr Sheen Original is surprisingly very effective. Spray on liberally, leave for a few minutes, then wipe off with a microfibre cloth (having first scraped off the worst). As above, paraffin and a toothbrush is good too. The best thing I've ever used is a mix of petrol/diesel but you need to agitate it and wash off quickly with water (but crap does just fall off).
Why do you need to wash off quickly , have been using kerosene and now concerned I should have been quicker?