My side skirts hide a multitude of sins and a weekend with a hammer found plenty of rust under glass and filler. The rear valance was similar with glass fibre carefully disguised beneath underseal ( I should have taken off the rose tinted specs before parting with my cash).

Anyway, two new full sills and lots of 1st class welding leaves me £600 out of pocket and the job of refitting the skirts. I'm worried that using standard alloy pop rivets will result in corrosion eventually. Would I be better off with s/steel self-tappers or some other solution?