how to delete a bunch of parts that are the same material?

hello i want to delete all these parts that are all corroded material

Try this!

function destroyPartsOfMaterial(child,material)
	
	for ind, part in pairs(child:GetChildren()) do
		if part:IsA("BasePart") and part.Material==Enum.Material[material] then
			part:Destroy()
		end
		destroyPartsOfMaterial(part,material)
	end
	
end


destroyPartsOfMaterial(workspace,"CorrodedMetal")

You can use this for any material! Just change CorrodedMetal to the material you want!

Here's a non-recursive solution:

local Material = "Neon"

for _,part in pairs(workspace:GetDescendants()) do
	if part:IsA("BasePart") and part.Material == Enum.Material[Material] then
		part:Destroy()
	end
end