You might not expect it, but the surrounding weather and conditions can seriously impact your project’s outcome when it comes to blasting and painting. While there is no time of year we’d recommend avoiding caring for your equipment, there is a best time for sandblasting, and that time is now.
If you’ve been putting off your machinery maintenance, or you’re looking for a great window to restore your vintage vehicle, then we’ve put together a quick guide below on the best time for sandblasting and painting. We’ll unpack how the weather and environment can impact your projects, and recommend an ideal window.
What is involved in a blasting and painting project?
Before we get into the environmental factors that can impact sandblasting and find out the best time for sandblasting, it’s important to establish what’s actually involved in the work.
Typically, there will be an inspection phase where we recommend the best blasting or cleaning method for your given project. Then, we’ll get into the blasting itself. For a vintage vehicle restoration, we might use a method like vapour blasting to offer a smoother finish, but machinery blasting and coating often demand something more gritty. Outdoor projects are another consideration entirely, especially if we are working in a marine environment.
Once blasting is completed, the surface should be coated as quickly and seamlessly as possible to minimise the possibility of flash rust. Once applied, this will take time to cure.
From start to finish, depending on the season, a blasting and painting project can take anywhere from a few short hours to a day or two on-site.
What environmental factors can impact sandblasting?
Sandblasting and industrial painting aren’t just about the equipment and materials. The environment you’re working in plays a much bigger role than most people realise, especially when it comes to preparing the surface and helping the coating last for as long as possible.
One of the biggest factors in finding the best time for sandblasting is controlling humidity. When moisture levels are high, blasted steel can develop flash rust incredibly quickly. You might finish blasting a surface only to find a light layer of corrosion forming before you’ve even had a chance to apply a protective coating. Once that sets in, a time-consuming and frustrating process of stripping away repeated corrosion begins, and it can seriously compromise the finish if it’s not handled quickly.
Temperature doesn’t matter nearly as much for blasting, though it can impact the curing times for paints and coatings. Cooler conditions slow curing times, which can lead to soft finishes (or simply more downtime while you wait for everything to set). On the flip side, warmer temperatures help coatings to cure more evenly and predictably.
The risks of sandblasting and painting in cooler months:
- Flash rust and corrosion in a more humid environment
- A grittier finish on the coating, thanks to debris from wind or rain
- Slower curing times
- More setup and monitoring required
None of these factors makes blasting impossible in cooler, more humid months, but they do influence how smoothly everything runs.
What is the best time for sandblasting?
To that end, the best time for sandblasting is definitely the warmer months in Aotearoa. The air is dryer, the warmer temperatures speed up any coating protection curing, and there is less rain or wind to deal with (which is especially important if your project is outdoors).
This is why many businesses choose this time of year to schedule annual maintenance, machinery refurbishment, or vehicle restoration. Everything tends to flow better, surfaces stay clean after blasting, and coatings bond as intended. If you’re seeking a faster turnaround time, then late summer is undoubtedly the best time for sandblasting.
This is also why we use our experience to plan around the environment rather than fighting it, though it is excellent when we can work in ideal conditions. That said, we pride ourselves on delivering high-quality blasting and painting year-round.
To manage humidity in the wetter or colder months for blasting, our operators use controlled environments, dehumidification systems, and adjusted workflows to deal with moisture and temperature carefully. The difference is that this can require more setup, more monitoring, and sometimes more time.
Remember, there isn’t necessarily a bad time for taking care of your sandblasting or painting project if you are working with a team of professionals. That said, the best time to sandblast is when humidity is low and heat is high, so the summer months are ideal for getting your work done seamlessly.
Our professional crews will integrate systems to manage humidity during the wetter winter months, but if you have a choice in the matter, the end of the year is an ideal time to schedule in your annual maintenance or restoration.
Access expert sandblasting Hamilton-wide through Hamilton Blast & Paint.
The team at Hamilton Blast & Paint serves the entire Waikato region with professional mobile and onsite paint and blast services. If you’re ready to protect your valuable assets, trust a team with fifty years of valuable experience caring for heavy machinery.
Right now is the best time for sandblasting your gear, so get in touch with us for a free estimate on your blasting and painting project.