u/Zastava77

I wanna dye my Mid-Gen Black Label smersh to make it look more like an old gen, i wanna go for that yellow color the Sbruya had but i dont know how to do it. Do i gotta dip it in coffee? tea? Sun-"color" it?

I could dip it in coffee or another staining liquid but im a bit afraid of de-coloring it in the sun cuz the material might get damaged, any advice?