temporary fabric dye-ing-ness?

[toxic-divinity.livejournal.com]

ok...i checked memories...and i was wondering about the temporary dying techniques some people offered. would any of them work on the shirt i asked about here?

http://www.livejournal.com/community/craftgrrl/4596505.html

cuz i'm wearing the shirt today and I dont know if I may want to wear it again (even tho I dont think I will, I'd like it to still be normal colored if I want to again). If I dyed it with watered down RIT dye could OxyClean take the dye out?? what if I colored the shirt with washable markers then oxycleaned it??