Scooter_roo's trick with the nail boards is a winner.
I saw the Squadron sanding sticks in LHS recently, at about £2.50 a shot, or about $4.25.
Trip to a local pharmacist saw me picking up a multi grade stick for £1.20, or $2!!!!!
Used it for the first time on my 262. Absolutely brilliant. Joints and seams dissapear completely leaving a polished surface ready for painting.
Well worth trying.
Karl