The Truth...About Powder Coating Over Old Coating

Are you applying a

powder

coating

over an old

powder

coating

? You can't do that or we can know what happens, so we thought we would address some best practice considerations and also the potential mistakes of powder coating over an old powder coating, but first hit the like and subscribe buttons if these videos interest you. they are useful. Now, let's get into it when we code over the top of the old siding. Here are a few things to consider before diving into the first consideration: There is no guarantee on the results. and here's why durability note that it is only as durable as the first coat, so depending on the surface preparation under that first coat or the condition of the substrate, it may or may not have a good adhesion to your piece, things can look great when the pieces are finished, however, let's say the first layer of powder was sprayed on top of a chrome plating that was starting to lift or peel, those are layers of powder that were You're going to wrestle with it, now your next consideration is color, bright, vibrant colors.

They have a tendency to bleed into new layers if they are a lighter shade, so it is advisable to cover bright colors with a darker powder, for example, if you have some red parts and you cover them on top with white, you are likely to see some bleeding. that looks like a very pale pink, the next thing to consider is the surface preparation of the old pieces. Shot blasting is not a very good option because it is very easy to have high and low spots in the old coating and you will see it in your finish, so scraping the pieces with a little whiskey brite is the best way to keep the surface smooth while it is It creates a texture on the surface to help the new layer of powder adhere, so let's go into the cabin and do this process together now that we're down. in the cabin with our part the first thing we are going to do is clean the entire part with denatured alcohol there are some spots that may be possible contaminants so we are going to go ahead and go over the entire part now that our part is properly cleaned and degreased, let's Take our Scotch Brite pad and with light to medium pressure we will remove the shine from the piece.

Unloading the parts before recoating is an important step because back ionization is not uncommon in the recoating process, so position the parts. in the oven to discharge after scraping, you simply need to bring the pieces up to the right temperature. It is not necessary to bring them to full cure temperature if you are not hot spraying, start coating after the parts have cooled and get the kv needed. Adjust as you go, as low as possible but as high as needed Once you're done, place the pieces in the oven, follow the curing schedule, and check the results when you're done.

All right, this will conclude today's video once again, we hope you found them useful. For you, don't forget to leave a comment below for future videos and I'll see you next time.