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I am going to be painting oak kitchen cabinets white and would like to hide the wood grain for the finished product. Anyone got any ideas on how to do this? I am going to be using a HPLV Spray gun when I do paint them
Use "brushing putty"
Use a grain filler. On oak I would recommend an oil based filler because it is less likely to raise the grain. Sand and apply finish.
Grain fillers, as JLMCDANIEL recommends, are intended for filling grain prior to staining. I believe you are talking about existing varnished cabinets?
I am not familar with the product suggested by Sombreuil. At $110for 2.5 liters (less than 3 quarts), I hope it would be good! It appears to be a very high solids, high build oil based enamel undercoater. It has a very long dry time.
In the past, I have used oil based enamel undercoater to mask undesired grain and texture. Enamel undercoater is designed to build up the surface and then be sanded smooth. I have used it to mask oak graining. I also used it for masking "ropey", brush marked past paint jobs.
You apparently have HVLP equipment. I would consider spraying the doors in a horizontal position, so as to allow maximum build without risking running or sagging. Unfortunately, this neccessitates spraying on two separate days, or at least, several hours apart. I would thin the primer sparingly. Mild splatter will be eliminated during a thorough hand sanding.
In the worse case scenario, a second coat of undercoater might be neccessary to obtain the desired build( this is also suggested with the brushing putty named in the above post).
The standard preparation applies - clean well and give a scuff sanding before undercoating.
I am partial to spraying an oil finish coat, however, oil paints do tend to yellow with age. Acrylics do not yellow, but fail to get hard, retaining a gummy, sticky feeling, especially in humid weather.