You engage the services of someone who specializes in restorations.
In general, yes. IF the rifle is a collector's item (not all old guns are) it can lower value greatly.
What guns?
This is a 16 ga made in 1947. Value depends on condition and originality. Typically these old style safety guns run $300-$600 and up to $1000+ for mint guns.
21 for Hand Guns. 18 for Long guns.
Depends on the car. If it's totaled and not driveable, probaby 10-20% of the value of a comparable clean car.
Tracii Guns is 45 years old (birthdate: January 20, 1966).
Young Guns Two is 1990 and I think the first Young Guns is 1988
I don't know the process to clean a tarnished firearm. However, if it is a very old one, or you think it has historical and/or monetary value, DO NOT ATTEMPT TO CLEAN IT. This can cause trouble in dating the weapon and will drastically lower its value. Collectors and appraisers like old, historic firearms as-is, with tarnish, rust and all. One way of cleaning without damaging is to clean with 0000 steel wool and gun oil....
It was made in 1928. Value depends on condition. being that old, only minty type guns command a premium. Used Ogden guns usually go $250 -$450 auto5man
Daisy has a web page to help you determine the value of old BB guns. See the link below.
USA: 18 for Long Guns 21 for Hand Guns
New guns have a better fire rate and have more attachments you can say. Old guns had horrible reloading and a lack of ammunition. New guns have enough and a good amount of ammunition.