Daanjie, and others, you should be aware that only up to 1972 was Nitrocellulose lacquer used for top coat on the wood. After about the middle of 1972, a two part polyester resin was used to topcoat the wood. The polyester resin is the hardest to strip, not the lacquer. The lacquer comes off very easy with stripper. Though, the quickest way to strip the lacquer is to soak the whole piece of wood in Acetone or MEK (Methyl Ethyl Ketone). For the polyester resin, heat is the quickest way to strip it, but can also be stripped by using a very strong paste stripper or a strong liquid stripper in which you'd also submerge the whole pieces.
Depending on how sun damaged the veneer is, after stripping it, the veneer can sometimes be sanded down past the sun fade. Caution is advised here, as the original veneer is only 1/64th of an inch think (for French walnut). The other two veneers that late W108/W109 cars used were Walnut root and Macassar Ebony. Theses two veneers are a little thicker than the French walnut.