You have a yellowed back in the collection dont you ?

[GHETTOBLASTER4LIFE]

I have no pictures but I give you my word on this,go to sallybeauty.com and buy you a bottle of '' salon care 40 volume crème developer '' ....its cheap.

Put this crap straight from the bottle onto the yellowed back and either sit it out in the sun for about 4 hours or sit it under a uv light for 12 hours.
I used a black light for mine.

Wipe it off with a towel paper and then be amazed how new it looks again.
Wish I had pictures,its easy as 123......so don't bother with that retrobright stuff,this is not only faster but better.

 

[caution]

I picked up some of this last week and am trying it right now on a test spot, now that a better UV bulb arrived yesterday. I've got 35% hydrogen peroxide and OxiClean at the ready if the creme doesn't do anything.

 

[SLO]

I picked up some of this last week and am trying it right now on a test spot, now that a better UV bulb arrived yesterday. I've got 35% hydrogen peroxide and OxiClean at the ready if the creme doesn't do anything.

Any luck?

 

[caution]

I stopped because it kept drying out from hydrogen under the plastic wrap, I was too busy to keep an eye on it. I think I added too much OxiClean. I'm going to give it another go, and also add glycerin to help with the drying out.