Removing storm window caulking
 

Just had all new window inserts put in. The old windows were covered by
aluminum storms and sealed in with caulking (sil.) The old windows were
surrounded by aluminum flashing, which looks great and did not suffer
any damage from the rennovation. Is there any wasy to remove the old
caulking from the flashing so I can paint over or am I better off time
wise just casing over it with rough pine. Scraping off the caulking is
not doing the trick.

ty