Originally Posted by eastexas
Do you intend to do the powdercoating yourself?
If not then the powdercoating place should take care of plugging any screw holes or anything you want preserved for you. Just inform them of what you want preserved. Any good company will have the necessary stuff already and should already be included in your quote.
If you are going to do it yourself then I can tell you the company my friend owns uses a variety of things depending on what is to be preserved. They use many sizes of rubber spongy plugs (like cone shaped ear plugs) for screw holes and any small holes. If it is a big hole or a large space that needs to be covered they use a thick type of clear greenish tape (like scotch tape but thicker and varying widths). Both the plugs and the tape are rated for high heat as the oven reaches 450 degrees Fahrenheit.
If you would like to know the exact products they use I will be happy to ask him.
If you do take this on yourself I can not stress enough the need to prep the material correctly and remember that some metals like aluminum can have what is refereed to as out gassing(bubbles that rise up in the coating). Aluminum sometimes require a base coat to prevent the out gassing. Also depending on the powder or look you are going for some powders require special techniques when applying such as primers,base coats,clear coats,etc.. So keep this in mind and apply to the manufacturers recommended method. Not all looks and powders are equal.
I will be happy to answer any questions you may have if you attempt this yourself but I do recommend a company. Doing this at home can be tough and if you plan on using a home oven I assure you that the oven will not be useful for any cooking of food again.
I have had almost every component of a computer powdercoated over the years psu,gpu backplates,ram spreaders,grills,heatsinks,cases,etc. because as I stated my friend has a company so I get this service at no cost. So I have been present for many of the processes. I have in no way done the work myself but am fairly familiar with the process.My parts are usually sand blasted-wiped down with lacquer thinner- holes/preserved surfaces covered or plugged- wiped again- powder applied in various stages with drying in-between each stag- finish results.
Good luck and I look forward to seeing your results.
By the way may I ask which powder you decided on?