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Old 06-28-2017, 08:54 AM   #1
Mini-Skoolie
 
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Painting Prep: What Grit # should I be using

I got a quote for painting my midsize bus and it was $12,000. Nope, I'll paint it myself thank you. Question, what Grit # paper should I be using to hand sand it down. Do I start with a rougher one and then use a finer one? Also, after it's all sanded, should I wash it down with water and when it dries start painting? I'm finally getting my bus back tonight from the international dealer, they worked on my engine and I'm excited to get started.
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Old 06-28-2017, 09:06 AM   #2
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Your plan sound good however wash it once then use a degreaser agent and then wash it again.

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Old 06-28-2017, 09:46 AM   #3
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Wash it with tsp you can find it at home depot in the paint section. For me its the best when prepping for paint
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Old 06-28-2017, 11:27 AM   #4
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# of Grit

Awesome, I'll do those things. Any thoughts on the # of Grit? I've seen, 100, 400, etc.
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Old 06-28-2017, 12:02 PM   #5
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Awesome, I'll do those things. Any thoughts on the # of Grit? I've seen, 100, 400, etc.
Depends. If you're just prepping an already good surface, I'd use a 300-ish grit.
Anything more coarse than that will just remove paint and leave big marks under your new paint.
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Old 06-28-2017, 12:22 PM   #6
Mini-Skoolie
 
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Awesome, I'll be sanding over the original paint so I'll go ahead and buy the 300 grit. Thanks
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Old 06-28-2017, 12:27 PM   #7
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Yep, I've been prepping my shorty for paint with 320.
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Old 06-28-2017, 02:06 PM   #8
Mini-Skoolie
 
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Did you followup with anything finer than the 320?
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Old 06-28-2017, 04:22 PM   #9
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Quote:
Originally Posted by heeranyi View Post
I got a quote for painting my midsize bus and it was $12,000. Nope, I'll paint it myself thank you. Question, what Grit # paper should I be using to hand sand it down. Do I start with a rougher one and then use a finer one? Also, after it's all sanded, should I wash it down with water and when it dries start painting? I'm finally getting my bus back tonight from the international dealer, they worked on my engine and I'm excited to get started.
So, the guy says with a straight face: "Mr. heeranyi,
I will paint your bus for 12 Large."

...at which you said: "Homina Homina...I need what grit sandpaper and how many gallons of Rust-Oleum?" ...quietly pockets $11,700.


Why are you sanding the bus? Not being dense, but if you are going to piant, you want to clean the bus first- TSP or a phosphate detergent to strip grease and oxidation.

Then sand to give the paint some tooth- something to grip. Your goal isn't to smooth the paint, but to scuff it. Sand any markings until just barely gone, lacquer thinner the shadow. I use a random orbit (DynaBrade) sander or foam pad is fine, too. I use light touch 220 grit sticky circles, stay away from high spots (hand sand w/ used sandpaper)- chair rail, etc. Stop if you see primer.
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Old 06-29-2017, 10:17 AM   #10
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Maybe he thought he could pull one over me, something about how much prep was involved. Okie dokie. I already ordered my sandpaper from amazon so my family will start getting to work. Thanks to everyone in this group
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