Paint removal - before you blast...
Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models
Be extremely cautious before you use any type of impact blasting process to remove paint from sheet metal. All of those tiny bits are acting like miniature hammers and can/will change the shape of your sheet metal. This can have especially negative consequences on the radius of fenders...particularly the rear fender - making it very difficult to install it again within the frame. How do I know this?
Instead, I recommend a less chancy approach such as baking the old paint off. This requires special ovens that heat things up to 800° Fahrenheit or so...and the paint just burns off. Or, you could simply use paint striper and/or good old fashioned sandpaper to remove the old paint.