On Thursday, September 8, 2016 at 10:37:22 PM UTC-4, wrote:
The aluminium alloy base of my airbrake caps is corroding and will have to be fixed at the next airworthiness review.Any comments about approved fixes or approved mods for a problem which I'm sure I won't be the first to have?

Have you asked on the Standard Cirrus Yahoo Group? They have 563 members.

https://groups.yahoo.com/neo/groups/StandardCirrus/info