Windex/Windolene with Ammonia cuts acrylic, but Tamiya stuff is tough.
Some in the UK, recommend Tescos' own brand Value generic cleaner, as cheap! Key ingredient is Ammonia.
In the UK, Fairy Power Spray is as good/more effective than Mr Muscle, but both will 'leach' plastic if left too long, & they eat Super glue & certain fillers as well.
Use rubber gloves, put plug in sink! then put model in plastic bag & spray, leave for 10-15 mins, then scrub with disposable toothbrush & Wash-up liquid, re-apply if needed.
It will be difficult to spray just one wing as the fumes will affect the whole model & also your health if breathed in!, so Windex/Windolene may be the best in this situation..