Intro: How to Repair Car Bumper
How to repair car bumper crack and motorcycle fairings at home easy.
Easy and cheap project with great results. Permanent fix with resin and fiberglass. This method can be used to fix many other broken parts like boats and fiberglass parts.
Step 1: Crack Repair
Start by making holes on the crack
Use copper wire to hold the piece as close to the original shape as you can
I use copper wire because it is easy to bend, it will not rust and it is easy to sand
After that turn the piece upside down, the repair will be on the back of the piece
Remove any grease and use sandpaper to prepare the piece.
I use cheap polyester resin and fiberglass
When using the polyester resin try to use the right hardner ratio
Apply the fiberglass and resin on the crack area
After 24h the resin is cured on top and we can work on the piece
I recomend you prepare the fiberglass pieces before you mix the resin with the hardner
I recomend you use gloves, dust mask and safety glasses
Step 2: Sanding and Filler
Cut the copper wire as close to the piece as you can
Use 60grit sandpaper to make the surface smooth, I used electric sanding machine on this step
For better result I recomend to apply a first coat of polyester filler with fiberglass
and the polyester filler with 220grit sandpaper
Apply a thin coat of body filler
Sand with 400grit sandpaper
Step 3: Paint and Results
Apply few coats of plastic primer
Apply the paint after the platic primer has dried
Apply clearcoat to finish the repair
I hope this instructable helped you!!