Front spar on HS, number 2

This time I got it right with the new parts. The 8 degree bends also became much strighter and at the right place with the small break from Clas Ohlson. Using a mallet to create the bends, as described in the manual, works but is very inaccurate.

Regarding primer, I need some washing/etching thing before applying the WG 6650 wash primer. At Aunes Karosseri they have never heard of such a thing, but another car paint specialist could get some DuPont/Corlar 5717S Metal Conditioner. He could only get 6 l, and I have to purchase all of it because it is something they never use. When reading the technical manual of the 5717S, it is meant to be used on ferrous metals and some other. Aluminum is not mentioned, so I am not sure if this is the right product at all. Monopol in France say I should use something called DERINOXALU, but have not been able to get it yet.