Styrofoam and plastic are both petroleum based products, thus an oil-based substance. Essential oils can dissolve other oil-based substances, so that is probably why it dissolved the styrofoam plate.
If you get the wintergreen on your skin and it burns, put some vegetable oil on it to dilute the wintergreen, then wash with soap and hot water. If you get wintergreen oil in your eye, put a little bit of vegetable oil in your eye to dilute the wintergreen oil (my Mom had this happen with a different essential oil and she said the vegetable oil really helped). The vegetable oil isn't likely to cause a problem for your eye.
I think you'll be ok as long as you're careful but Poison Control may be able to answer your question better than I can, or perhaps Google... Don't eat the oil in any significant quantity - it could cause salicylate poisoning..
Chronic Lyme Disease, Chronic Bartonella (clinical dx only), Gluten & Sulfite Sensitivity, Many Food/Inhalant/Medication/Chemical Allergies & Intolerances, Asthma, Gut issues (dysmotility, non-specific inflammation), UCTD ("Secondary Lupus-Like Syndrome"), Osteoporosis, chronic Lymphopenia, etc.; G-Tube; Currently trying to wean off TPN.
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