Is Gesso a Good Primer for Painted Rocks?

Yes, in my opinion gesso is an excellent primer for painted rocks.

Gesso (pronounced jes-oh) is used to prepare a canvas for painting. (If you would like to know more about gesso, this article "What is Gesso and How is it Used in Painting?" is very informative.) 

I've been hearing about gesso used to prime rocks (my canvas) and thought I'd give it a try instead of the usual white, acrylic paint.

For my experiment, I purchased two types of gesso from the Michaels.com website...

• Regular - Folk Art brand
• Super Heavy - Liquitex brand

...and selected a smooth stone for the regular gesso and a pitted stone for the super heavy gesso.

My process:

• Brush one coat of each type of gesso on a stone (regular gesso on the smooth stone, super heavy gesso on the pitted rock)
• Paint the same design on each stone using one coat of various brands of acrylic or acrylic craft paint
• Use an art pen for thin details
• Seal the stones

Gesso features and performance:

• Folk Art - regular gesso
• Consistency of toothpaste
• Applied with a brush easily and smoothly
• A little went a long way
• Covers well
• Can be mixed with acrylic paint for a colored base coat
• Soap and water clean up
• Quick drying

Regular gesso applied to a smooth stone

• Liquitex Super Heavy gesso
• Consistency of cake icing or spackling compound
• Somewhat messy
• Applied with a brush and required smoothing in different directions
• Can be tinted with acrylic paint
• Soap and water clean up
• 24 hours to dry
• Brighter white than the regular gesso

Super heavy gesso applied to a pitted rock

Paint colors and brands used:

• Craft Acrylic (craft acrylic is a thinner consistency than regular acrylic paint)
• Anita's Orange
• Anita's Christmas Green
• DecoArt Cherry Blossom Pink

• Acrylic
• Americana Snow (Titanium) White
• Apple Barrel Bimini Blue (turquoise)
• Apple Barrel Red
• Apple Barrel Lime Tree
• Apple Barrel Black
• Folk Art Sky Mist (light blue)

 
The acrylic and acrylic craft paint colors adhered very well with both types of gesso. The brush moved smoothly across each rock's surface.

Results of one coat of paint applied over each type of gesso

There were no problems using the art pen on the gessoed and painted stones. In fact, the pen drew especially well on the pitted stone primed with super heavy gesso.

Results of art pen used on gessoed and painted stones (Sehnaz Bac design with permission)

My final photo clearly illustrates the benefits of using white acrylic paint or gesso as a primer for a stone. The paint colors on all three primed stones are brighter than the unprimed stone. The difference is most apparent when you compare the orange hue on each painted rock.

Results of no primer vs. acrylic paint and gesso primers (Sehnaz Bac design with permission)

© Cindy Thomas Painted Rocks

How to Prepare Rocks and Stones for Painting

Cleaning is the first thing I do to prepare my rocks for painting. 

• Use a little dish detergent and water
• Scrub the rocks to remove dirt
• Rinse well
• Allow the stones and rocks to dry completely

• CLEANING TIPS: 
• I like to do several stones at one time in a bucket
• Dirt from the stones may clog the pipes, so be sure to dispose of the cleaning water in a suitable place
• To sanitize the stones after washing and rinsing, I add a little bleach to a bucket of clean water, then rinse well 

Many rocks need just a good cleaning and no other preparation for painting.
 
Priming will make your project go much easier for certain types of rock and stones. 

Candidates for priming: 

• Smooth stones
• Dark-colored rocks and stones
• Rough, porous, and/or pitted rocks or bricks

SMOOTH STONES 

I purchased these landscaping stones in the garden department of a big box store. 
 

They are a great shape for rock painting, but the smooth surface makes it difficult for paint to adhere properly. Without priming the rocks first, my design and hard work can peel right off. 

To prime these stones (after they've been cleaned and dried), I just apply 1 or 2 coats of white (or light colored) acrylic or craft paint. 

The light primer not only helps subsequent paint layers adhere but also brightens subsequent colors.

Update August 2017: My preferred primer is gesso. Learn more about gesso and how it is used.

DARK-COLORED STONES 

A coat or two of white or light-colored paint applied to dark stones helps brighten subsequent paint colors as illustrated below.

Painted Rock Ladybug Color Counters

PITTED OR ROUGH STONES OR BRICKS

There are several ways to prime pitted or rough stones.

Acrylic paint can be used to fill the pits (if they aren't numerous or deep) by dabbing the paint into any little crevasses or holes. 


Landscaping bricks, edgers and pavers are very rough. I like to brush on a product called KILZ to prime them before painting.

 

Sometimes, I smooth wood filler over a rock's holes and cracks to fill them before applying a primer and/or painting. 

Update August 2017: For slightly pitted stones, I now use super heavy gesso. Learn more about gesso and how it is used.

To protect and seal my rocks once they are painted, I brush on Americana DuraClear Satin Varnish. 

 

These are the supplies and methods I prefer for painted rocks preparation and protection.

© Cindy Thomas Painted Rocks 

Year-Round Display for Painted Rock Nativity Sets Using Natural Elements

You learned the simple and easy way to display your painted rock nativity set.

Here's how to display painted rock nativity scene figures year round using natural elements such as a:

• Piece of slate
• Wooden bowl or plate

Idea 1: You'll need a piece of slate which has flat areas to accommodate all three nativity scene figures. Clean and dry the slate and place the painted nativity rocks on top. You now have a natural, easy, simple way to display your nativity set year round.

Piece of Slate Used for a Natural Nativity Set Display

Idea 2: You'll need a wooden bowl or plate

Wooden salad bowl and charger plate

Fill the bowl with smooth stones and add the nativity figures...

Wooden Bowl + Smooth Stones + Painted Rock Nativity = Natural Display

...or fill the plate loosely with smooth stones...

...rearrange the stones around the larger, Mary and Joseph nativity figures so they are sitting directly on the plate. Add the Baby Jesus nativity figure on top of the stones. 

Wooden Plate + Smooth Stones + Painted Rock Nativity = Natural Display

Up next: Year-round, painted rock nativity set displays using candle accessories.

© Cindy Thomas Painted Rocks

Can't Find Rocks to Paint?

Some of us have an easier time finding rocks to paint than others and now that winter weather is setting in, who wants to scrounge around outdoors for stones?


Tip: Visit the Garden Department of your local stores

• Walmart
• Home Depot
• Lowes
• etc. 

to see if they have any landscaping pebbles, stones, or rocks they want to get rid of.


On a recent trip to my local Walmart, I discovered many torn bags of landscaping stones stacked near the Garden Center. When I inquired about them, I was told the torn bags were being returned for a credit, however, if I wished to purchase some, I could do so for 1/2 price.

Tip: Try to negotiate for a discount if you live in an area where winter is setting in and landscaping is the last thing on a homeowner's mind. 


These decorative, landscaping stones are the type of rocks which make my eyes light up:

• Smooth
• Unpolished
• 2-3 inches in size
• Various shapes

Here's just a small portion from the bag I purchased which have been washed and set out to dry.

Landscaping stones purchased for a discount at Walmart

Tip: Be aware that polished stones found in craft stores are pretty, however, paint doesn't adhere to them easily. It may require sanding, priming, and a few coats of paint if you use these type of store-bought pebbles.


Now I have a large supply of rocks, stones and pebbles to keep me busy painting during the winter while I'm stuck indoors.


Idea: If I paint rock garden decor, perhaps Spring will be here before I know it.


© Cindy Thomas Painted Rocks