Hello, dear friends! Many car enthusiasts still believe that only welding can cure rust on a car body. I want to refute this statement.

I have been using fiberglass and polyester resin for many years to repair through rust.

In general, it is intended for plastic. You know, they make door cards from it, in places under the speakers. Tuned bumpers and so on.

But, craftsmen have long been using it for car body repairs.

And to answer your question, it is reliable, it will not fall off and has very good strength.

Naturally, it is impossible to repair places under load in this way. For example, cups, side members, bottom (partially possible).

Many may say that they did it this way, but later on, saffron milk caps appeared in those places anyway. So, they did it wrong!

Look, a Kalina recently came to me, the lower part of its front fender was rotted

I cleaned the rust and this is what happened:

As you can see, the rust has eaten quite a lot. In this particular case, it would probably be easier to cut the piece off and weld another one.

But I ran out of acid and they were supposed to bring it to me only in a couple of days.

I didn’t want to wait and repaired it with fiberglass.

So, after you have completely removed the rust, you need to additionally treat the surface with a rust converter. Then wash it off, degrease the surface.

It is important to do this because you may think you have completely removed it, but it is still in the pores, you just can’t see it.

And also, when you have cleaned the rust and processed the metal, you need to start repairing it right away. Don’t leave the “bare” metal even for a day, it will become covered with rust again!

Next, we dilute the resin (2g of hardener per hundred grams of resin) and cut off the required piece of material.

We apply resin to the metal with a brush and glue the fiberglass:

Apply resin on top with a brush. Depending on the damage, you can glue several layers of fabric. I glued two layers to this place.

Now we wait for it to dry. It takes about an hour. To speed up the process, you can heat it up with a hair dryer. Unfortunately, I didn’t take any more photos, so I’ll tell you this.

When the resin dries, the fabric becomes like metal, strong. We cut off the excess with a grinder and then sand this place with 80-120 sandpaper. This is necessary in order to fill the risk, since we will put putty later.

Now, we putty this place (I use fiberglass putty) and then paint. That is, everything as usual.

If you did everything correctly, then such repair will last for a very long time, not one year. The main thing is to remove all the rust, if you do not do this, soon the rust will form again.

Those who believe that corrosion can only be treated with welding can continue to think so and spend more time, effort and money on repairs.