Reading a few threads on the 356 forum as well as the following photographs on http://www.356garage.com.au/ it would seem that the crazing can be successfully removed by filling the crazing with superglue then sand/polish the surface:
You can make the old one with hairline cracks almost new yourself.
1. Flood cracks with cyanoacrylate (Crazy) glue. Make sure it is the water-thin variety. Let dry thoroughly, say overnight.
2. Sand with super fine paper--1800 or 2000 grit.
3 Buff with "plastic" medium (from Eastwood) and soft wheel, being super careful NOT to overheat the plastic horn button.
![Image](https://farm2.staticflickr.com/1746/42664965901_54903d1918_b.jpg)
![Image](https://farm2.staticflickr.com/1742/41947421914_60467f35be_b.jpg)
![Image](https://farm2.staticflickr.com/1729/42664964961_42a408b153_b.jpg)
Just wondering if anyone had tried this?
Thx
Martin