Cleaning a Plia Chair  

Most
Most Metal or Chrome cleaners are good for acrylic and plastics
I'm in the UK
T-Cut or Autosol are good here

soap and warm water with a...
soap and warm water with a soft cloth should do it. let it soak for a few minutes first.

Thank you!
Thank you!

lighter fluid
...works like a charm on all sticky residue, never damages any material. (Even works on sticker residue on paper-- books, for instance; dries invisibly.)

followed up by Flitz plastic polish
(...removes minor scratches and dirt.)

.
A little alcohol...watch out with all the cleaners...warm water and a paper towel.You can get some strange reactions with all the others...