Pressure washers make sense in light of his hand injury.
If he had to clean up it would have been pretty hard to do
one handed.
I'm not "sold" on a "poison ivy" rash yet.
I also don't think "mace" rash either.
"The spray should be aimed at the face of an attacker."
His rash was reportedly on his arms... hands...???
A rash may have been noted at the first ER visit,
I doubt it would be on the police report.
Any rash that developed later does sound more like poison ivy.
Chemical burns from cleaning up are possible as well.
I'd need to know exactly what brand Mickey carried.
"Mace PepperGard® Pepper Spray, Mace Pepper Foam, Mace Triple Action, Mace Muzzle® and Mace Double Action® are Mace"
"MACE is a brand name. Don't get Mace confused with Pepper Spray. MACE is a registered trade name for the brand of defense sprays manufactured by MACE Security International. A Mace brand defense spray either contains OC pepper, tear gas or both"
If Mickey's "Mace" was just Oleoresin Capsicum or "pepper spray" (OC)
"The length of the effects of pepper spray depend on the strength of the spray but the average full effect lasts around thirty to forty-five minutes, with mitigated effects lasting for hours."
"OC also will create an intense burning sensation on the surface of the skin. However, OC will cause no lasting after effects"
The spray should be aimed at the face of an attacker.
http://www.womenonguard.com/faqs.htm
If he had no rash on his face then I highly doubt the rash was from Mickey's "mace"
It does make me wonder if that isn't why he ended up at Whiskey Bay though...I can picture him running for the water after being stabbed and sprayed.