I think Sooji came from Hindustani originally like so many words used at in the British armed forces and Merchant navy, Jildi, asti, decka, jao, avis, arrier, panni, dhobi and indeed ashore, such as Bungalow.
As Martin says a lot of ships now have big high pressure washing machines in the ER and high pressure piping all round the decks for washing down with fresh water, some can inject metered amounts of liquid detergent as well although I am not sure how that complies with MARPOL or Port State Rules.
In Victorian times soojiing was all down by hand with rags and liquid soap or hard block soap was used with a dash of washing Soda, for stubborn dirt "strongers" was used with a dash of Caustic soda. (No gloves then either)
When I came to Sea it was all "Teepol", then various proprietary Chemicasl from Vecom, Unitor etc. Nowadays the detergent supplied by Unitor/Willhelmsens is so good for the environment it won't clean anything so we have gone back to "Fairy Liquid" a well known British brand of domestic washing up liquid.
I remember the soluble oil Merlyn is talking about, a prime cause of skin cancer and dermatitis, I think it has been banned nowadays.
Several European built ships I sailed on in the past used the same soluble oils as a corrosion inhibitor in the cooling systems, never seemed to find favour in the UK or USA. That was banned also, partly because of Health reasons and partly because of MARPOL, dumping tons of emulsified oil into the Bilges every time you did engine work really screwed the OWS.
It is always better to ask a stupid question than to do a stupid thing.