If you yourself have taken up the putty of your car, then you are probably wondering: do you need to remove the old layer of paint before putting it on?
If the car has an old paintwork
You can remove the old paintwork in the following ways: mechanical and chemical methods.
The mechanical method is grinding parts with a grinder and coarse sandpaper No. 80 and No. 100. Advantages: low labor intensity and speed. The disadvantages are that there are hard-to-reach places that need to be cleaned manually.
The chemical method is to remove the paint with a remover. To do this, apply the remover to the part with a spray gun or brush. After the paint swells, remove it mechanically and rinse with water. Repeat this several times. After these works, you need to sand, degrease, prime, dry and putty.
If the car has a factory paintwork
To get started, place the car in a well-lit place. Remove bitumen and grease stains with White Spirit or degreaser. Then examine the condition of the paint. Use colored chalk to mark any chips, cracks or dents.
After you have removed the gloss from the paint, you need to putty. For this work, you need a set of spatulas and putty. The putty is selected depending on the thickness of the layer. For a thick layer, choose fiberglass, for a thin layer, use regular or fine-grained. To prevent a thick layer of putty from bursting, you need to straighten the part well.
You can not putty in the sun !!!!!!! Medium air temperature is more suitable for puttying. Also, do not putty at low temperatures. In winter conditions, the metal should be heated. It is not recommended to putty on bare metal, on gloss, on an old paint layer. These actions lead to the fact that the putty does not adhere well and cracks. Before applying the putty, it is necessary to prime the metal, clean the paint surface. The putty is applied on a well-cleaned surface, it will not stick to bare metal or gloss for a long time.
You need to carefully examine the paint layer. On the layer of paint to be removed, you will see a matte surface and microscopic cracks. In this case, the entire layer of paint should be removed before applying putty. Do not putty details on gloss !!!!!
Do not putty on a dry paint layer. If you use natural drying, leave the car to dry in the garage after painting without heating the metal, then the time until the paint is completely dry can increase to two weeks. At this time, it is not recommended to sand and putty, as the putty will spread the paint. In order to speed up the drying, you need to direct the lamp or colorimeter directly at the part. If you have a complete painting, then for each part separately. In this case, you must follow the precautions. Do not leave heaters unattended and do not place them too close to avoid overheating the paint.
