I used AppleGuard on my mono speedy when I bought it two years ago.
- covered the canvas with paper towels held by painters tape, and sprayed the handles and trim.
- wiped dry the metal.
- applied 2-3 coats - letting it dry in between coats.
The vachetta dried completely normal with no blotches. I haven’t used it a lot so the patina has been slow to develop. The one time I was caught in a drizzle, the vachetta did not have any spots.
Since then I have used the Apple Guard on my PA DA and any light colored leather shoes and sneakers. Yesterday, I purchased a strap for my PA so I plan to apply AppleGuard before using it.