Finishing W123 Year of construction 79

Hello, I own a 123er of 79 as a fine weather vehicle. Last time I skipped it 2 years ago, then Meguiars Step 1 and 2 (Handpolitur) and the Meguiars GoldClass wax on it. In between sometimes the Meguiars spray wax. Today I worked on my father’s gulf with Knete, Zaino AIO and Z2/Z6. Wow… Not bad The idea came up to the W123 to treat once again. Immediately after the laundry the Benz is clean, pearls 1a off… But against the sun light one sees fine scratches (is except for a fender of the original varnish). Unfortunately in some places (especially at roundings) the base varnish tears unfortunately. According to the paintr a well-known problem of the first water varnishes from the 70s. That one can not do much is clear to me, however, one can hardly see these fine cracks immediately after the grow. I would like to apply the Zaino also on the car, because the wax is empty anyway. Chleifpolitur am I supposed to get there? I have a Festool Excenter and a cheap rotary machine (type Ebay goal would be to get away the fine scratches in clear varnish before sealing. Unfortunately you can see it badly on the photos. I am grateful for tips.