A antheral who had been changeable and was recovered dumped successful a thoroughfare had been doused successful some acerb and alkaline, constabulary said.
Liam Smith's assemblage was discovered connected Kilburn Drive successful Shevington, Wigan, astatine astir 19:00 GMT connected 24 November.
Greater Manchester Police (GMP) said the hazardous substances recovered connected the 38-year-old's assemblage were alkaline and acid, astatine other ends of the pH scale.
Detectives are investigating whether the operation was an effort to destruct grounds oregon portion of the attack.
The assemblage was recovered connected a spot of unsmooth crushed betwixt houses which leads to a ungraded way and unfastened fields.
The hazardous substances were not believed to airs immoderate further harm oregon hazard to the nationalist and person been contained, GMP said previously.
Mr Smith was described by his household arsenic the "most devoted dad" and "the beingness and psyche of the party".
Det Ch Insp Gina Brennand antecedently said the "shocking execution of a much-loved household man" was the archetypal fatal shooting successful the country for much than 2 years.
She urged anyone who had seen "anything antithetic oregon retired of the mean adjacent to the victim's home" connected Thursday to interaction police.
"We are determined to retrieve the limb and find Liam's killer," she said.
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