Ya, every year I have to get in there and clean things up.
Note, my bike is for commuting bike (in summer), and so this is really minimum maintenance as far as most owners are concerned. The bike looks really good for most of the year, but it's a continuous process to keep it looking clean and well-maintained:
1) Start with natural de-greaser (green cleaner) to get the surface(s) clean.
2) Next, white vinegar to reduce any corrosion build-up. (note, this step is not going to work on already badly corroded parts, but will keep corrosion from building-up over time)
3) Finally, some aluminum polish to bring out the luster. Note: I'm currently using mag cleaner for aluminum polish because it is designed for unpolished surfaces. Lots of aluminum polishes on the market, but most are for polished surfaces and are too gritty.
Word of caution; Unless you're a professional re-finisher, avoid doing anything more like mechanical polishing (wire brushes, steel wool, etc.) as it will never look as good.
Hope this helps.
P.S. Late '85 models came with painted front forks. I painted mine this year in part because they were so dingy looking, but also because I put on some '93 3-spoke rims complete with painted brake disks (interior painted) and so it would have looked odd otherwise.