How to spray single stage urethane paint

Single Stage Urethane is a product specially made for cars looking to accomplish a paint job without having to always use a clear coat.

However, urethane isn’t waterproof, so you can’t drive through a puddle or anything like that. While the mixing recipe will vary from brand to brand, in general, it’s four parts paint one part reducer, and one part hardener.

spraying single stage urethane paint

A question that some of our new customers may not realize they need to ask is “What do I need to get started painting my car?”

This seems like an easy enough question to answer but, when you take a closer look at all the different products and accessories you have to choose from, things can easily start to get confusing pretty quick.

To alleviate some of this confusion for our customers who prefer one-step automotive paint systems, we developed a line of high-quality paints.

Most of them are single-stage and come in varying colors from light custom shades to bold factory-replica hues.

Do the Job Right as we break down how easy it is for even beginners to use Eastwood paint kits for their next project.

Step 1: Apply Rust conditioner

To apply rust conditioner to rusty areas, first you will want to use a plastic putty knife. Then with mechanical action, work around and into the affected area.

You might have to do this for each affected area for a few minutes at least, so as to get your project looking nice and rust-free again.

applying rust conditioner on car for painting single stage urethane paint

Finally, once you’ve applied your rust conditioner with pressure, apply body filler in all of the holes where rust was spotted using a plastic putty knife.

Feather the filling out into the edges by using a piece of sandpaper at an outward angle and feathering it inwards until you meet your arc of body filler perfectly!

Step 2: Masking the area

Mask off all areas which are not to be painted by using tape and masking paper. Apply the tape carefully and avoid any messy cleanups of overspray later.

If the sheets of paper need to be taped down, do so in a way that will prevent overspray from going underneath them as well.

Masking the car for painting process

Step 3: Fill spray gun with primer

First, go grab yourself a primer. Fill up your cup and turn on your compressor. Go ahead and give that spray gun a little test and see just how it’s performing.

Have your adjustments ready because you’ll need to create a 90-degree angle with the nozzle, exposing it straight to the surface of your painting.

You don’t want any of that pesky extra paint getting outside of that stage area, do you? So, make sure your adjustment handles are on hand and at the ready.

Step 4: Start spraying

When painting with a spray can, hold the can at a distance of 6 inches from the surface. Use a left-right motion to go from the end to half way across, overlapping about half of your previous pass.

Use a speed or pace that will leave you with a shiny coat without any possible issues like runs, drips or separation.

Once you’ve finished your first pass, rotate the tip 90 degrees and make another stroke going up-down this time. Let this coat dry for 2 hours.

Step 5: Sand the surface

To prep your items for paint, lightly sand them down with 220 grit sandpaper. Apply a light coat of primer first, then a guide coat.

This is important to use when you’re preparing any pieces to be painted because it lets you identify problem areas later on when you actually carry out the painting.

This is an easy way to catch issues before they become big problems.

Step 6: Fill with Urethane

Unless you like slathering on thick layers of paint, it’s best to spray about three-quarters full with the urethane. Then, you’ll need to add hardener and reducer.

fill the paint for car single stage painting

You can find these at a hardware store or online. It’s great for products that don’t spatter when sprayed.

We recommend the Satin Treated Urethane from Glidden! Not only does it dry quickly but it also dries smooth and glossy, which is what most people look for in a floor finish.


if you are planning to spray a single stage paint yourself, you’ll need to get a few things ready. First, you’ll need a spray gun, spray gun fittings (gun, air cap and air hose), paint can and a paint can lid, paint thinner, rags and paint stir stick. Small cans of paint can be sprayed without a gun, but the job will be easier with a little help from a gun. You’ll need to familiarize yourself with and follow the instructions that come with your gun, especially instructions related to cleaning, oiling, storing and otherwise maintaining the gun. When you start painting, remember to wear gloves, eye protection and a paint respirator. Be sure the area is well-ventilated, and pull all electric cords out of the way to avoid tripping on them. Finally, mix your paint in small batches. This makes it easier to work with and reduces the chance of paint drips and runs.

It really depends on the type of paint you’re using. If you’re using an acrylic or latex paint, it should be ready to spray. However, if you’re using an oil-based paint, it might not be ready. You can mix it with linseed oil to thin it down.

You can clear coat over single stage urethane. However, the results may not be as shiny or durable as if you clear coat over a two-part urethane. If you’re okay with that and you have a paint shop nearby that would be willing to mix you a good quality single stage urethane, then you should be able to clear coat over it. You should have no problem clear coating over a high-quality single stage urethane.

Yes you can. The problem with spraying over single-stage paint is that it is a different product, and sometimes not the best product. If you spray over a single-stage paint, your new paint will have a frosted look to it. The original paint will be shiny and the new paint will be a dull, white powdercoat. But, if you are just showing your car at car shows and such, and you are not planning on keeping the car for a long time, then it will work.

Conclusion on How to spray single-stage urethane paint

Here is the complete guide to spraying single-stage urethane paint on your desired surface without making any mistakes on the surface.

Newbies should follow each step explained in this guide in order to achieve better results in their painting.

If you still have any question in your mind which confuses you then don’t hesitate to comment down your query and I will try my best to clear it as soon as possible as I could.

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