Sanding Flat Panel Doors

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Painting doors with the PSDRID.

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What happens here

The presenter highlights the critical need for proper sanding, especially for flat panel doors. Unlike paneled or wood-grain doors that can hide imperfections, flat surfaces will reveal every flaw, scratch, or imperfection. He shows existing scratches on the door as an example (from a dog) that need to be addressed. He explains that he uses a dustless sanding setup consisting of a 3x4 Festool sander hooked up to a HEPA-filtered Mirka vacuum to minimize airborne dust. For sanding, he typically uses two abrasives: a half-inch open-cell sponge abrasive for general sanding and a 320-grit FilmTec or AcoStorm abrasive for flat sanding and between coats to achieve a smooth, flawless surface required for a high-gloss finish. He proceeds to demonstrate sanding the door with the sponge abrasive.

Goal: Achieve a perfectly smooth surface on flat panel doors before painting

Tools and materials

Dustless Sander Festool — Mechanically sanding the door surface efficiently while minimizing dust
FilmTec or AcoStorm Abrasive — Fine-grit sanding, especially for flat surfaces and between coats, to achieve a high-quality, smooth finish
Sponge Abrasive — General sanding and smoothing the door surface, particularly for contours or general surface preparation
Vacuum with HEPA Filter Mirka

What they say

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top and bottom you're just going to have to screw it right into the middle you'll somewhere where a hinge would go and then you're just going to have to spackle those and touch them up it's very simple and easy to do I'm going to be sanding these doors we want to prep our doors it's essential to really sand these doors they're not like six panel doors with wood grain like we typically see where um you know it really hides imperfections and flaws these are flat panel doors that do not hide imperfections and flaws you can see right here this is where your dog was your scratch it on the door scratch the door up quite a bit so we're going to be sanding it uh in my booth it's really nice cuz it's got a dustless uh sanding setup a 3x4 sander um is out here with my Unita ecosan um vacuum out there Unita vacuum that's a hepac it's hooked up there's almost zero dust when it comes to sanding when I'm doing doors I typically only use two abrasives I'll use a half a/2 inch open cell sponge abrasive just like this it's going to attach right to the sander and if I have to do any flat sanding I'm going to be using a pad saver film Tech or ecostorm a 320 grit to do the sanding there so I'll usually typically you'll either do 220 or 320 if I'm uh standing in between coats it's definitely a 320 sometimes it's 220 or um 220 or 320 you know just on the initial sand this door is in pretty good shape you know front and back there's no imperfections on it at all I've already sanded this with the flat erases so now I'm just going to go over the whole door and sand it with a half2 inch sponge and you'll see what that looks like now

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