Prep for blasting?

[Giff]

I'm steadily sorting some areas of rust and removing some panels ready for blasting.

As I'm cleaning up certain sections I'm finding a lot of seam sealer and sometimes with surface rust behind it.

Do I need to remove all of the seam sealer on the shell or will blasting / soda blasting clean it off?

[guru_1071]

best to remove it, it its thick the medium will just bounce back off it.

[Giff]

Cheers, feared that would be the case and hoped otherwise! Theres rather a lot of the stuff on my '67 shell....