 There'll be no getting around what you had in it because it will, you know, they're white, typically white plastic, and it will stain it. You'll know that's what it is. It'll be stained, technically. But you could buy a really, and I'm talking cheap, you could buy a pump sprayer for $15, $20. You know, go to Walmart, Home Depot, wherever, buy the cheapest pump sprayer they've got. It may even be a one-off use depending upon how much you're doing. Okay, if it's a part of the cost of the job, when you're done, toss it, you know, off you go, done deal. But, yeah, that's a great idea.