jeffp1167

I'm putting a 91-up rear bumper on my 90. Is it possible to fiberglass in the 3rd brake light hole at all? Figured if possible then wouldn't have to deal with removing my hatch mounted 3rd brake light.

Any of you guys ever tried this?

JackDidley

Fusor makes resin for urethane, I am not sure about filling a hole that big. I think it would be easier to fill the holes in the hatch.

jeffp1167

I'de rather have the brake light on the roof if at all possible. Figure what I could do was grind the outside of the cover a bit then overlap the out side of the cover and then sand smooth. This way the fiberglass would have a stronger bond then just doing the backside of the cover.

Another idea I had was making a mold of the light so the filler panel still bolts in place then just fill the gaps.

I have the stock 89 bumper to practice on and test resins and how well they bod even when the cover is flexed.

c4cruiser

Fiberglass would become solid and the chances are that flexing of the rear cover would eventually cause cracking and the piece of fiberglass would fall out.

If you aren't keeping the original cover, cut out a piece from the same area so that it fits in the brake light hole. Then use urethane patching material to bond the insert into the hole.

When the new cover gets painted, make sure that a flex agent is added to the paint for the cover.

jeffp1167

Yeah I can cut a section out of the 90 cover to do this as well

CooterCatchinVette

I've heard of plastic welding for urethane bumpers. And unless you are using a very old paint system or absolute garbage paint, you shouldn't need to add any flex agent. There are patches with epoxies you can buy but I don't know how well they work.

JackDidley

This may be a project that could be helped by the paint and body forum.

jeffp1167

I saw this method which seems to be a strong repair

http://www.youtube.com/watch?v=DQFYhdtrkbQ

anciano

Ain't it wonderful how easy the pros make it look? My fiberglass and plastic repairs more resemble Dr. Frankenstein's work.

turbotim23

Hi I've worked in body shops fixing bumper covers. To do this right needs a patch of the same type of urethane as the bumper cover, you have to melt the patch into the bumper cover and use the right filler and adheasion promoter to get the filler to stick to the repaired area. Without experence doing this you might be better off taking the cover to a body shop and having them do it.