Use a hot air gun to heat all the anti corrosion wax, and wipe away with old rags, if you're just looking at a tidy up, then use Red Scothcbrite on the best areas, and treat any rust appropriately (Use the search function, to find how to deal with rust) you only need to spot prime rusted and repaired areas.. the more work you put in, the better the end result
Thom