8 Best Fiberglass Body Fillers (September 2026) Tested Reviews

best fiberglass body fillers

After three months of patching rust holes, rebuilding corroded truck beds, and rebuilding a friend’s classic Corvette fender, our team put eight of the most popular fiberglass-reinforced body fillers through real shop work. We compared short-strand versus long-strand formulas, polyester versus structural-grade putties, and tested each one against automotive steel, SMC panels, marine fiberglass, and … Read more

8 Best Self Etching Primers (September 2026) Tested & Reviewed

best self etching primers

Painting bare metal is unforgiving. Standard automotive primer beads up on aluminum, peels off galvanized steel, and lets rust creep back underneath within months. Self etching primer solves this with phosphoric acid that bites into the metal surface, creating a chemical bond no regular primer can match. Our team spent six weeks testing eight of … Read more