IKEA wall clock HACK

Hi guys
‘Just a quick note to mention the small IKEA wall clock (see 1st clock in picture) for Kent Axell’s wonderful mental effect taught at our January event has an almost washed out look–all white–as received from the vendor.
We (Gail) were able to remove the face of the clock and use a black magic marker to highlight the numbers for contrast (see 2nd clock in picture).  
It was really quite a challenge to remove and replace the face, but the finished product is certainly worth the time spent in terms of visibility.