Alloy wheel corrosion causing air leaks

Called out to a lady with a flat tyre today, it turned out to be corrosion on the rim. Caused by kerbing the wheel, and the Brighton salty air getting under the alloys paint. It then blisters, allowing air to seep out of the tyre, causing a flat. The solution is to strip the wheel, clean off all the loose paint, and apply a sealer, before refitting the tyre.