Never washed it. Use the duster & detailer. Looks (better than) showroom new. I bought it off the showroom floor. I won't do that again, too many finger prints, but a good detailer & cleaner works fine. Always use a microfiber towel, NEVER terry cloth. I also have a 1984 Eggshell white Corvette, been doing the same for 24 years & over 250K miles. Looks new. However, the last 2 years it's been a garage queen & covered up most of the time. It doesn't really snow here in Vegas, but we did get some rain last year, but I slep in that morning till noon & missed it.
08 Mysterious