Professional Fiberglass Repair

Fiberglass is a robust and resistant substance that keeps metal free from corrosion and wear. This lightweight material has been used in several vehicle parts, including the body of your car. But no matter how strong it is, it can crack or break.

Do you notice your broken bumper for quite a long time and don’t have enough time to fix it yourself? No problem then, you can reach out to your Auto Body Repair Milwaukee Wisconsin professionals to get it repaired or restored.

Handing it over to the experts will be the right decision since you will get the best results with fewer risks compared to doing it by yourself.

Understanding the fiberglass repair is not that hard. However, it is best to rely on professionals for this task. Here is how they will conduct the fiberglass repair tasks at the location.

Inspection and addressing the issues

You can say that your bumper is broken right now. But the next question is: how severe is it? The damage to the fiberglass part might be minor or massive. Therefore, the solutions managed by the Auto Body Shop Milwaukee, Wisconsin, will also be different for each level of the impact or damage.

Here are the common cases where you should let the experts help you with:


Lamination failure occurs when the tensile strength of the composite item is surpassed. This causes a fracture that goes through the substrate.


Someone or something might have caused an impact or nudge to create holes and punctures in your car.  A composite part can take this type of damage when the tensile strength of the chassis has been surpassed, and the lamination has failed. When this happens it causes a fracture that goes through the substrate. We categorized this as a primary repair task and is pretty challenging to handle by yourself.

Sandwich Core Damage

What is sandwich core damage? This type of repair focuses on the composite parts that are affected or damaged by particular accidents. These composite parts have sandwich core materials that can affect the mixed skin of the laminate to alter the shape. Usually, the sandwich core material is collapsing, so that it needs special treatment. Generally this type of repair requires specific tools and a set of skills to take care of this matter.


For all intents and purposes, de-lamination is the process by which the clear coat of an automobile begins to peel away from the layer of paint beneath it. It might appear as a peeling, damaged spot on the surface of your vehicle, and it is not attractive. De-lamination is generally only a minor problem at first, but it may become quite serious quickly if left untreated.

Untreated the damage can spread quickly and when you realize it, it can be too late. Bring your car to Tender Car Auto Body Shop Milwaukee, Wisconsin, as soon as you see the problem area on your vehicle.

Cleaning the Area

How do we prepare for the repair? Our auto body shop experts will first clean the affected region with a formulated solution. This will remove the dust and debris, as well as other particles that can hinder the procedure. They will make sure that there’s nothing in between the resin and the surface of the vehicle. It is the key to a high-quality bond of the new layers of wax.

After inspecting the damaged area and marking it with a contrasting marker, our professionals will remove the damaged material. The frayed fibers tend to “hang up” on one another when a portion is damaged or crushed and that is part of the process as well.

To optimize the strength of your restoration, we track the material’s removal layer by layer. With use of a saw blade, we cut along fractures or rips to assist. They will stop occasionally to perform a coin tap test while removing damaged material. This will guarantee you have eliminated all damaged material, and they should keep grinding or cutting until they finish the prep.

Sanding the Area

Our auto body specialist will sand both the surface and the underlying region. In general, we use taper or scarf sanding to increase the surface area.

A high-speed compressed-air power sander is then used to sand the scarves. Because the majority of composites are relatively thin, this technique is quite a gentle and meticulous procedure.

Making the Resin

Tender Car will mix the resin for the repair. The accurate fiber and resin ratio for the repair is essential to ensure the good results of the repairs. The resin mixture will wet the bonding area. Curing the resin can take as long as 48 hours to finish.

Applying the Resin

To apply the resin, our technician will prepare the fiberglass cloth, which size is by the affected area that needs to be fixed. Then they cover it with slightly larger cloth for good results.

The stuck cloth will then be applied with resin being very careful because this resin dries super quick. In total, the whole process takes about 10 minutes. So our auto body guys really pay close attention during this time. Sometimes but not always, this procedure needs to be repeated for optimum results.


The area where the solution is applied, will be left to dry. It is then checked to see if the fiberglass needs more time to cure and maintain the solidity.

Sanding the Area

The next step is to sand the area after the drying and curing process is finished. At this phase, you will notice changes in the surface of your car as with any fiberglass repair. At this point, our technician will smooth out the irregular areas to get ready for the painting process.


The painting is the final phase of the fiberglass repair. This is where the moment of truth arrives and your car becomes as good as new!

Fiberglass repair is something that you don’t have to handle on your own. Hiring a pro for this project will save you time and money.  Reach out to the Auto Body Repair technicians at Tender Car Waunakee, Wisconsin is your best solution.