Painting a room—or your entire home—can be an exciting way to refresh your space. But a few common missteps can turn your DIY dream into a frustrating ordeal. At Randall’s, we want every painting project to be smooth, beautiful, and successful. Here are answers to frequently asked questions about painting mistakes to avoid, along with expert tips to help you get the job done right.
1. What happens if I skip prepping the surface before painting?
Skipping prep is one of the most common and costly mistakes. Dirt, grease, flaking paint, and holes can all cause poor adhesion and an uneven finish.
Avoid it:
Always scuff-sand glossy finishes or use a deglosser to ensure the new paint bonds properly. We carry easy-to-use options at Randall’s.
3. Is it okay to skip primer?
Only if your walls are in perfect condition and you’re using a high-quality paint-and-primer-in-one on a similar color.
Avoid it:
Use primer when:
- Changing from dark to light colors
- Painting over stains or patched areas
- Painting raw surfaces like drywall, wood, or metal
4. Why is my paint streaky or patchy after drying?
This is often caused by uneven application, low-quality tools, or improper drying between coats.
Avoid it:
- Use high-quality rollers and brushes (available at Randall’s).
- Work in manageable sections.
- Maintain a wet edge to avoid lap marks.
- Let each coat dry fully before applying another.
5. What causes paint to peel or bubble?
Moisture, improper prep, or painting over a dirty or glossy surface can cause peeling or bubbling.
Avoid it:
- Let the surface dry completely (especially in kitchens, bathrooms, or basements).
- Ensure good ventilation.
- Never paint over mildew or damp areas—clean and dry first.
6. How important is paint quality? Can I go with a cheaper option?
Paint is one place where quality truly matters. Lower-quality paint may require more coats, wear out faster, or fail to adhere well.
Avoid it:
Invest in premium brands like Benjamin Moore, Farrow & Ball, or Sico Evolution, all available at Randall’s. Our experts can match your needs and budget.
7. Do I really need painter’s tape?
If you want crisp lines and fewer touch-ups, yes!
Avoid it:
Use painter’s tape along trim, baseboards, and ceilings. Remove it while the paint is still slightly damp to avoid peeling.
8. Can I paint in any temperature or humidity level?
No. Painting in extreme cold, heat, or humidity can affect drying and adhesion.
Avoid it:
- For interior painting, aim for 15–25°C (59–77°F).
- For exterior painting, check both temperature and dew point.
- Avoid painting in high humidity (over 85%).
9. How do I avoid visible brush marks?
Poor-quality brushes and over-brushing are usually to blame.
Avoid it:
- Use the correct brush type for your paint (natural bristles for oil-based, synthetic for water-based).
- Don’t overload the brush.
- Apply in smooth, even strokes with minimal pressure.
10. Should I shake or stir the paint before starting?
Always stir paint thoroughly—even if it was just mixed.
Avoid it:
Pigments can settle. Stirring ensures even color and performance.
Bonus Tip: Ask for Help!
If you’re ever in doubt, stop by Randall’s. Our knowledgeable staff is happy to:
- Recommend the right tools and products
- Match paint colors perfectly
- Offer free in-store and in-home color consultations
- Schedule professional services if you'd rather leave it to the pros
Ready to Start Your Next Project?
Visit our Ottawa store or book a consultation today. Whether it’s a single room or a full-home transformation, we’re here to help you avoid mistakes—and fall in love with your space all over again.