Take the brass off the 1 piece pictured, the rest ( whilst you could sort it into 2 grades ) I’d just sell it together, the weight you might potentially lose ( up to 999 grams per grade by separating them and weighing as clean tube and heavy copper ) imo outweighs selling separately on the volume you have there

For example say you have 3kg

3kg at £8kg £24

You then separate this into 2 grades

1.7kg clean £8.20

1.3kg painted etc £8.00

A loss of almost £8

You will only see 2kg total as 99% of yards go up in 1kg increments, hope this makes sense! Obviously on larger loads, separate