Laser spars are made of aluminum tubing. New spars come with stainless steel rivets holding the various fittings in place. Over time the aluminum can corrode causing damage and eventually spar failure. To help prevent this damage the stainless rivets can be drilled out and replaced with aluminum. These will cause less damage over time, although Aluminum is considerably weaker and the rivets will need to be replaced from time to time. The rivets should be inspected for wear and damage on a regular basis to prevent any nasty surprises. Corrosion inhibitor paste should be applied where stainless fittings come in contact with the aluminum.
The kicker pulleys can put a lot of tension on the kicker fitting, which can in some cases bend the boom. It is worthwhile to check the boom for straightness particularly after windy sailing. The boom has an aluminum tube liner inside near the kicker fitting. This liner adds a lot of strength to the boom to help prevent the spar from bending.
During the quiet winter months it is worthwhile to check your spars for loose fittings or rivets and make sure they are not bent. Spars can last longer by changing rivets and also swapping ends on the spar.
The topmast on a Laser is made from the same tubing as the boom, so if the topmast is broken keep the long bit, it may be used to replace on old boom.