The issue with this set is that the inner box foam has deteriorated (I think from heat in storage) and made a mess of the set. It is like a gooey black paste. I have spent hours cleaning this set, but it is not perfect and could still use additional cleaning. When cleaning I only used water because I didn't want to discolor anything and wasn't sure what to use.
The set may clean substantially better with the right cleaning solution. The passenger cars cleaned better than the engine and there is still some foam residue in places on the set.You will notice some of the brass handles and some detail plastic parts have corroded and need replacing or sanding and painting (if possible). Please review the pictures closely and understand this set is not perfect with deteriorated foam in various spots all around the set. I needed to discard all the paperwork that came with the set and the Styrofoam is soiled (as pictured). All the units have been protected with new tissue paper. The huge box has some wear and marks.
The C1 in the listing title refers to my inventory location. Let me know if you have any questions.