Aluminium is one of the most well-regarded materials for boats thanks to its excellent strength-to-weight ratio and ability to resist corrosion. That means many owners will not see the need to use marine paint on their aluminium boat, but doing so actually comes with several important advantages, especially when you're thinking about applying marine paint below the waterline. Here are just five.

1. Improves Appearance

Aluminium boats might resist corrosion, but the patina that the protective process creates can often leave a boat looking slightly shabby over time. As such, many owners paint their aluminium boats simply to keep them looking their best, especially if they've already been on the water for several years. As an added plus, a coat of paint can help your boat stand out from others, which is always nice when you spend a lot of time moored up.

2. Prevents Chemical Corrosion

Seawater isn't the only thing that can damage the hull of a boat. You'll also need to think about chemicals that may be found in the waters of a crowded marina, as well as any fluid that might leak from your own boat. Fuel can be particularly damaging. Of course, you can always add a layer of protection by applying marine paint.

3. Provides Camouflage

If you don't use your boat for fishing, camouflage might sound like an odd requirement. If you do, you'll appreciate the need to avoid scaring fish away before you have a chance to land your catch. Unfortunately, the sight of unpainted aluminium can cause fish to keep their distance. You can stop that from happening by painting the bottom of your boat in a more neutral colour.

4. Slows Down Growth

Marine growth can slow down your vessel, place added stress on the engine, and eventually damage the hull, so slowing that growth is always a good idea. Marine paint contains anti-fouling agents, and it will coat the hull in an impermeable barrier. As such, the accumulation of marine growth will be significantly slowed.

5. Prevents Galvanic Corrosion

Galvanic corrosion is an electrochemical process that can occur when two metals are in contact. Such corrosion will typically result in significant pitting across the bottom of the hull. This is why most aluminium boats are fitted with magnesium or zinc anodes—these act as sacrificial metals that will corrode instead of the aluminium. You can help prevent galvanic corrosion even further by coating your hull in marine paint.

Contact a company like Crystal Paints to learn more.