I rank the different choices in this order:
1. .063 aluminum, bonded.
2. FRP
3. .030 rivited aluminum
Aluminum bonded looks the best, is dent resistant and lasts forever.
FRP looks way better than rivits and wavy .030. It has the potential for water damage or delamination but is easy to repair small areas.
Thin aluminum looks terrible, the holes with rivets are asking for corrosion and a bird strike, golf ball or kids toys will dent the hell out of it. Each hole and rivit causes drafts, leaks and is hell to wash/wax.
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