You got this stuff across the pond?

https://www.amazon.com/dp/B00579Z6Q2/ref=cm_sw_r_cp_apa_glt_fabc_C5PA1WZAVDN0KMFQ749Q?_encoding=UTF8&psc=1

Put it in that for a day or two and run with old toothbrush will get most the paint off. What's left can usually just be painted over.