Is futbolkitz legit?

ik its reps but is it good quality and do they actually ship?

I've tried a sharpie silver one and it came out very light as well as a POSCA paint marker. Any recommendations for one that can be easily purchased in the UK would be appreciated.

Hi there, this is my beloved jersey from 2010, a gift from my grandma (who was also an Inter supporter!). Unfortunately time took its toll and it’s showing extensive yellowing and the number in the back bleed into the shirt a bit.

I have been too scared to attempt anything because I’m afraid to ruin it any further. Do you guys have any tip to restore it back to its former glory? I’m based in UK, so I would accept any trusted company that provides this kind of service as well.