no good now but unless you are the type who will go an collect owed money, then you shouldn't be releasing their stuff until you have got full payment.

Pay you next week? fine, pick your shit up next week.

I have dragged people to court before - businesses - and if they know how to wriggle out you will get nothing other than your own costs to pay, even balifs fail lol!! so private people would be even harder.

Chances are you will need to suck it up and hope it rains paint stripper one night.

If they ever come calling again for more work, get then to pay up for the last job first, implying you will then do the next job and then once you have your cash, tell them your too busy and go elsewhere.