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Professional decorators repeat the same advice: preparation determines the quality of your finished result. A poorly prepared wall will show imperfections, patching, and poor paint adhesion regardless of how high-quality your paint or how skilled your application. Rushed preparation is the most common reason homeowners are disappointed with DIY decoration results.
What Preparation Involves
Proper surface preparation means clearing the room of moveable items, protecting floors and remaining furniture with dust sheets, filling holes and imperfections, sanding smooth if necessary, washing the surface to remove dust and grime, and priming if required. For previously painted walls, you need to assess whether the existing paint is sound or whether it requires removing. Peeling paint must go; firmly adhered paint in good condition can be painted over once cleaned and primed.
The Detail Work
Filling and sanding is where time investment matters most. Small holes deserve proper filler (not caulk, which shrinks), applied slightly proud of the surface, then sanded smooth once dry. Gaps between wall and skirting should be caulked (caulk is correct here) for a professional finish. Sanding existing walls—even sound ones—provides tooth for new paint to grip. Many DIY painters skip this step and then wonder why paint appears dull or peels.
Priming
Primer matters more than many homeowners realise. Over dark colours, primer provides essential coverage. Over newly filled areas, primer seals the filler and prevents paint appearing patchy. Over glossy surfaces, primer provides adhesion that paint alone won't achieve. Yes, modern paints promise "paint and primer in one," but these compromise on both fronts. For truly professional results, separate primer and paint remains standard practice.
Protection and Cleanliness
Dust sheets protect your floors and furniture—falling paint splatters are inevitable. Where dust sheets don't reach, use masking tape along skirting boards and around trim. Remove this immediately after painting while it's still fresh; dried tape takes paint with it.
For specific advice on choosing tools and techniques, see choosing the right tools for the job. For colour selection guidance, read about choosing your colour scheme.