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Better Thick Paint Removal with Sandblasting

Posted on: August 23rd, 2018 by byersbushblog

Sandblasting paint can be a challenge on some old painted surfaces, especially those having a very thick or durable paint. Industrial machinery, car parts and even some outdoor furniture types are made to have long-lasting paint. As good as they look, the time will come for repainting and sandblasting to remove old thick paint may need extra help to scrape off the stubborn parts.sandblasting

Sandblasting or bead blasting is a generic term for the process of smoothing, shaping and cleaning a hard surface by forcing solid particles across that surface at high speeds. The effect is similar to that of using sandpaper but provides a more even finish with no problems at corners or crannies. Sandblasting can occur naturally usually as a result of particles blown by wind or artificially using compressed air.

There is no single perfect 1-solution-for-all paint removal, not even sandblasting. Sometimes sandblasting combined with other methods would make a better solution.

Here are 4 tips for better results in old thick paint removal:

  1. Turn Up the Pressure

Increase the pressure to get a more powerful blasting rate. Try to push past 50 PSI on the gauge to drive off persistent paint. Sandblasting relies on pressure to remove old paint. The correct pressure will give a wonderful result. Just keep an eye on the maximum, you don’t want to get too excited and blow things up.

  1. Use a Paint Stripper with Sandblasting

Sandblasting paint removal may take some time to clean off the painted surface so you can use a paint stripper to speed up the process. Read the instructions on how long you should wait for the paint stripper to work well against the old paint before you brush it over. Once the paint softens and bubble up, get your sandblaster to work. Paint strippers won’t completely remove old paints so it’s best to combine it with a sandblaster.

A word of caution: many paint strippers are extremely nasty and toxic substances. They’re harmful to your skin, so wear appropriate protection to avoid injury. Protecting more areas of your body would be a better idea. There are new non-toxic and biodegradable products manufactured by some companies available in the market. You should browse first and see which one fits your purpose.

  1. Combine Paint Heat Gun with Sandblasting

Increasing the paint surface temperature would soften it just like when it was first applied. You can use heat guns which is an electrical tool that directs a lot of heat onto the paint’s surface and causes it to soften so that it can be more easily scraped off. Sometimes scrapping it off can still be tough and time-consuming.

It would be best to have two people work together, one heating the paint with a heat gun and the other person immediately sandblast the paint off while the paint is warmed up.

  1. Use a Coarser & Harder Sandblasting Grit

For a more obvious solution, try a coarser and harder grit on your sandblaster. It will blast the paint much harder and dig deeper into the surface, reducing the amount of time for sandblasting. Larger chunks of paint will fall off, but this may also cause the material below the paint to roughen up. It doesn’t matter that much though, because you still need to smoothen the surface prior to re-painting.

Byers Bysh has been in operations since 1968, specializing in powder coating and sandblasting. We are one of the oldest powder coaters in the GTA. Contact us today and get a truthful, no surprises evaluation for your painting need!

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