On big model rockets, ya bilge rat, t' spirals in t' body tube may need t' be filled prior t' paintin' them. Well, blow me down! This video will show you t' fastest and easiest method o' fillin' t' spirals with minimum amount o' sandin' afterward. Well, blow me down! For more how-to build model rocket videos, me bucko, visit: www.ApogeeRockets.com