The rental-pressure-washer fallacy
The most common graffiti DIY plan is "rent a pressure washer, blast it off." Occasionally it works — on fresh latex over sealed concrete. Usually it either fails (paint bonded into pores laughs at cold water) or succeeds catastrophically, etching a permanent wand-mark shadow into the surface that outlives the tag by decades. Pressure is a rinse, not a remover.
How professional removal actually sequences
- Chemistry does the removal — a remover matched to the paint medium and the surface breaks the bond first; this is where the expertise lives
- Heat multiplies it — hot-water equipment lets both the chemical and the rinse work at far lower, safer pressure
- Pressure just carries it away — dialed to the surface: what's safe for sealed tilt-up would destroy stucco or heritage brick
- Test patch first — always, in an inconspicuous spot, before committing to the whole tag
Where blasting fits
For cured paint on masonry where chemistry alone won't finish the job, fine abrasive (soda) blasting lifts paint gently without cutting the substrate — a specialist's tool, soft where sandblasting is brutal. And on delicate heritage surfaces the whole toolkit shifts gentler again: poultices, low pressure, patience (our sensitive-surface service).
The honest summary: successful removal is 80% choosing the right chemistry and 20% rinsing it off. If someone's pitch for your wall is measured only in PSI, protect your surface and get a second opinion — we'll give you one free from a photo.