Hello there ! 
I have recently bought a perfectly functioning Waldorf Q yellow , but despite of its very good shape, the synth needs a very serious front panel cleanup while the previous owners apparently didn t care at all. So , I would like some advises and help in order to give it its youth back . !
Thank you in advance !!!
Hello: Watch out for stains, some come off with a water cleaner, and oil stains that come off with solvents.
Use a water moist soft rag, rub-off the stains (no scrubbing)
On another clean dry rag apply a drop or 2 of WD-40 to clean and rub-off oil stains, glue and duct tape residues, this is the best cleaner.
Make sure to wipe it dry, it could damage. the paint if it stays for too long.
Hi !
Thank you for your tip 
It seems that the previous owner was chain smoking in front of his synth during the last 20 years , so the result is that there is a sticky layer of nicotine with incrusted dust darkening the yellow color …
Until now I was using hot water with dish soap plus an electric tooth brush and it give pretty good results (if you are very very patient and relax ) . To finish the tooth brushed area , I gently used a car polish liquid.
I made a little test on the LFO area partly cleaned up to see the differences ( very obvious when compared with the wheels area ) . Cleaned area has a more vivid colors and very smooth surface.
I will give it a try with the WD-40 .
Thanks .
Mr. Clean Magic Eraser for all cleaning needs, damp with water but not dripping wet.
