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In this Discussion
- 46HudsonPU February 10
- Davethesandblaster February 9
- dcannell67gmailcom April 10
- Kdancy February 10
- Oldfarmer1947gmailcom February 10
- Rod February 9
- Scott April 10
- StillOutThere February 9
Sandblast Car
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Can I use Plastic media to strip paint off a classic car?
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Yes.
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I was wondering if anyone ever had there car stripped with PMB (plastic Media) and did this process work efficiently. I currently sandblast sheet metal (without warping I'll add) but was considering purchasing a whole other unit to expand my business. Thanks
Dave -
Sandblasting can cause hydrogen impounding (embrittlement) of metal as well as warping if high pressure is used against thin metal (like GM hoods!). Mediia blasting has been used on cars or panels off cars probably tens of thousands of times and can not warp or embrittle.
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Have sandblasted auto sheemetal for years, BUT, you must use the finest sand available.
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Advice on sandblasting - If you do it, don't use 'play sand' - keep that for the grandkids and making sand castles.
Go to your hardware store (HomeDepot or Lowes), and ask to 'special order' commercial grade sand. The store's Quikrete rep will add it to their normal restock delivery, so there shouldn't be any special delivery fees either. And, it is surprisingly inexpensive.
http://www.quikrete.com/PDFs/DATA_SHEET-Commercial Grade Sands.pdf
It comes in coarse, medium and fine. As Rod indicates, order the fine (although for some heavy cast parts, frames, etc., you may want to go with medium (I have not yet tried coarse).
Make sure you do the blasting outside (or a blasting cabinet), and even then, wear sufficient breathing protection (no, the el-cheapo paint masks are not sufficient, by any means). -
I've used "play"sand for years but I always sift it to take out the bigger sized particles first. Like any method, you need to learn the proper tecnique for proper application.
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Soda blasting is great way to clear body and frame without stressing sheet metal. Clean up with a hose and you can leave glass in if desired. Some parts of USA the soda blasting company will come to your location. Cost is equal or less than sand blasting. Check the yellow pages.Oldfarmer1947@gmail.com
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Soda, plastic, or glass based media is fine if all you are doing is removing paint - however those type of media do not remove rust, which tends to be an issue in most older vehicles (even if it is just surface rust). For removal of rust a more agessive/abrasive media or different method will be necessary.
And there are issues with priming and painting surfaces that have been soda blasted - mainly due to incomplete or inadequate cleaning after sodablasting, somewhat similiar to inadequate or incomplete cleaning after chemical type cleaning or dipping.
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Actually soda blasting completed by a professional operator will remove surface rust, expose previous body work. The cleanup for soda is a blow off and water rinse. Without wash down the completed work can be left several days without priming. In any case interaction with base paint prep and resurfacing materials will not result in negative finish results.Oldfarmer1947@gmail.com
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@Oldfarmer1947gmailcom - Per 'soda blaster' instructions and cautions, a use of 'soda only' will not remove rust. Many professionals are now using a combination (mix) of soda and other abrasive media (in some instances) either for a more aggressive 'bite', or specifically for removal of rust, etc..
Before acquiring any 'soda system', if you intend to remove or blast rust with it - you need to ensure that the system will support mixed media (or can be modified to support mixed media).
Yes, an adequate clean-up / surface prep will remove residual materials (which is what I indicated). However, when 'soda' was first used, many paint manufacturers (PPG and others) would not warrant or guarantee the results or the adhesion/bond of their paints if soda blasting was the medium used to clean the surface - so much so that there are still 'soda' specific cautions in many paint manufacturers instructions. -
I recently blasted my 37 with an eastwood media blaster and Glassbead. no warpage and it removed all rust. Do not use sand because it will cause silicosis which can lead to that thing known as death.
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I hired a soda blaster to come to the shop. It did not remove any of the rust, except the very loose parts. It still left the pits with rust in them. DuPont shop I buy my paint from gave me grave warnings about cleaning the metal before applying paint.
It did however work well on paint removal on wood.
