PSA: Don't use real blood on props unless you test it first on the finish

I was building a replica knife for a horror short last month and thought I'd save time by using some leftover fake blood from a party store. Big mistake. The red dye soaked right into the handle finish and left a permanent pink stain that I couldn't scrub off. Turns out food coloring and silicone don't mix. Now I test every liquid prop on a hidden spot first, no matter how small. Has anyone else had a prop get ruined by a reactive chemical or dye?

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susanh464mo ago

That's the thing about finishes, they're all basically trust exercises until proven otherwise. Paints, resins, and even some dish soaps will betray you the second you let your guard down. Real life is like that too - I've left a lemon on a nice wooden table for an hour and it created a pale ghost print that never went away. Hand sanitizer eats through some car dashboards like it's acid. You'd think by now we'd all know what reacts with what, but every material has its own little tantrum waiting to happen.

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piper1754mo ago

Learned this one the hard way with a resin cast I had painted up all nice. Used isopropyl alcohol to thin some cheap craft paint and it literally melted the top layer off like butter. Just a few seconds of contact and the whole finish looked like a wrinkly raisin. Had to strip it entirely and start over from the primer coat. So yeah, test everything even water based stuff because some finishes react to stuff you wouldn't expect.

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