Hi All,
I know almost nothing about finishing. I'm using an oil based poly to finish a project. What grit sand paper should I use between coats of poly? Is vacuuming enough to clean off the dust that is created? What about the final coat, should anything be done after the final coat? Thanks.
Questions worthy of starting a bar fight, since so many different opinions. :laughing:
I do not know what may be deemed "correct" but I have my own preferences.
For oil based, I like to use wipe on poly. Thin coat, but spreads evenly and if you pay attention you can avoid sags and drips.
After the coat has cured I use a dampened piece of wet-dry paper, 400 or 600 grit. I use very light pressure. If the piece of paper is folded do NOT use the folded edge, it will take off too much finish.
I am looking to minimize the amount of the previous coat removed. Mostly looking to take down any nibs/dust/high spots. The wet paper works well for me, I can feel when the grit has done its work.
I then wipe down with a damp sponge or damp paper towel. Vacuuming alone will not get all the dust off. You may not see the dust, but it will be present and may show or especially be felt after applying the
next coat.
For non-turning work I leave the final coat as is. Should be smooth.
For turning work I buff with Tripoli compound and my Beall buffing wheel.