Hydrochloric Acid
Hydrochloric Acid Acid is used to etch newly laid cementitious before painting.
It is also available to remove unwanted mortar splashes from bricks.
Hydrochloric acid and can also be applied 
as a rust remover.
See Phosphoric Acid.
It is inportantant that the all H&S and Product details are followed as stated on the manufactures data sheets before use.
Stabilising Solution:
An oil based paint used for consolidating powdery surfaces and coating such as limewash /distemper, prior to applying water or oil based coatings.
Osmosis
Osmosis
Cause
Osmosis is generally associated to areas where fibreglass and polyester resins have been uses.
This system, used in the production of modern yachts is where Osmosis is most likely to occur but also
precast structures such as GRP Swimming pools.
Osmosis
GRP Swimming Pool due to small pin holes left in the laying of the glass fibre weave. This same type of problem can occur in wall surfaces when moisture pressure from the reversed side of the structure has not been sealed and allowed moister vaper to enter to bare untreated substrate.
This is related to the external cavity walls where the air movement within the cavity maybe restricted.
Initially small blisters become visible and over a period of time increase in size.
For example this problem can also occur where GRP and Cementous concrete swimming pools have been used and when in situ the revers side has not been sealed.
The water pressure present in the surround ground level can cause moister ingress into the substrate and blisters of the paint coatings occurs
Remedies.
Before remedial work is carried out the and retreated the moisture content should be below 12%
For further information on Osmosis: https://www.yachtingnews.com/osmosis
Spraying Airless Common Problems and Remedies
Airless Spraying and Equipment
Common Problem and Remedies
Airless spray equipment is based on an electric motor (petrol driven motors are available) and hydraulic pump driven system to delivers paint/coating products under very high pressure up to 3000 pounds per square inch (PSI) to the spray gun.
Motor unit does not run or stops.
a) Check the origin of the power supply and all connecting cables followed by pressing the reset button.
b) Check the fluid control settings.
c) Confirm the switch in the ON position and the pressure control regulator is correctly set to maximum pressure setting.
Cannot Prime
a) Pump inlet suction filter blocked. Remove and clean.
b) Air in the hose or pump. Seal or replace.
c) Valve set on prime. Turn key onto spray.
d) Air in pump or hose or inlet filter blocked.
e) Check the piston packing has not dried out and the ball valve is free.
Material too viscous.
a) Confirm manufactures’ data for product viscosity and thinning ratios.
b) Check syphon tube for blockages or air leaks.
Pressure not being maintained
Check:
a) Filter to pump inlet – clean.
b) Pressure setting too low - increase
c) Air in either pump or hose – with spray gun trigger held open for 10-15 seconds to clear any air.
d) Spray tip too large.
Irregular and poor spray pattern
a) Size of spray gun tip incorrect- change tip.
b) Incorrect pressure – Adjust as necessary.
c) Material too viscous – adjust with correct thinner to manufactures recommendations.
Cannot shut off material supply at gun.
a) Thoroughly clean spray gun with product thinner/solvent.
b) Needle stop nut too tight- loosen slightly.
c) Needle worn – replace.
Spray gun will not operate.
a) Safety trigger on.
b) Inline filter blocked – Clean or replace - Adjustable tip blocked.
Spray pattern has Tails and strips:
a) Pressure too low – increase pressure.
b) Paint too viscous – see manufactures data for thinning.
c) Tip too wide – Adjust to reduce pattern size.
d) Spray tip worn – Replace.
Pressure does not increase when paint is drawn up:
a) Bypass valve in prime position -Turn valve to spray.
b) Air in hydraulic system – Bleed system.
c) Pressure valve incorrectly adjusted or worn sprat tip.
Spray pattern uneven:
a) Blocked or worn spray tip – replace tip.
Spray tip keeps clogging:
a) Contaminated material – Check inline gun filter.
b) Dry paint in spray tip - clean.
Pump not drawing up material.
a) Suction tube either loose or damaged drawing in air.
b) Suction tube not immersed in the material.
c) Suction Filter blocked.
Pump primes but no pressure.
a) Suction filter blocked – remove clean or replace.
b) Prime switch not set to spray.
Spray repair and service companies
Trade Spray Services 01686829001 tradepaintservices.co.uk
Spray Plant ltd 01133233117 [email protected]
Masking and Protection of surfaces 2
Protection of Surfaces
Different types of covering sheeting/foils are available to suit all eventualities where care is required to protect clients furnishings and fittings when interior/exterior projects are carried out.
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Absorbent Fleece
Re-usable and absorbing covering fleece for all kinds of surfaces absorbing fleece on the upper side waterproof PE coating with non-skid bottom. |
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Plasterers Covering
High quality covering foil for most applications. |
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Self Adhesive Floor Coverings
Self adhesive protection foil for surfaces like wood, laminate flooring, tiles and stones the adhesive layer is on the outside of the roll, therefore easy to roll out high protection against damage or pollution clean removable up to two months. |
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COVERING FLEECE AIR
self-adhesive breathable protection fleece - lightweight and very strong breathable and liquid proof - clean removable up to two months after instalment |
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WILTEC CARPET COVER
Transparent protective film for soft surfaces such as carpet and flooring with an adhesive layer on the outside, so easy roll out - can be left for up to two before removal after providing high protection against damage or contamination. |
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AUTOWRAP FOIL
White protection foil with adhesive layer - designed to protect painted surfaces from weather and minor mechanical damage - resistant to chemicals and easy to remove |
Masking and Protection of Surfaces 1
MASKING AND PROTECTION OF SURFACES
The final results of any project is reflected on the standard of decorative finish with the paintwork along with the protections of surfaces.. Masking tape plays an important part and the correct usage of tape will help to provide the final finish..
 MASKING TAPE EXTREME 
Special reinforced rice paper (washi) masking tape -for slightly wet and rough surfaces - no paint bleed (sharp paint lines) - indoor and outdoor use - 4 months UV-resistant - resistant to temperatures up to 100 °C - never any glue residue. |
 MASKING TAPE 60 
Paper masking tape resistant to temperatures up to 60°C - used by professional painters - and industrial use, does not leave any glue residue - masking paper with standard crepe tape - ideal for effortless and fast masking small surfaces like window- sills and skirting boards - leaves no adhesive residue up to 24 hours |
MASKING TAPE PURPLE  
Special rice paper (washi) masking tape - low tack tape for sensitive surfaces like wallpaper, fresh paint etc. no paint bleed (sharp paint lines) - resistant to temperatures up to 50°C - never any glue residue up to 4 months |
MASKING TAPE GOLD  
Special rice paper (washi) masking tape - no paint bleed (sharp paint lines) - indoor and outdoor use - 6 months UV-resistant to temperatures up to 100 °C - never any glue residue |
 QUICK MASK GOLD 
Static masking foil with original Masking Tape Gold - ideal for effortless and fast masking - suitable for indoor and outdoor use - ideal for creating sharp paint lines - leaves no adhesive residue up to 6 months |
Product illustrations courtesy of Deltechtape NL. https://www.deltectape.com https://youtu.be/4OdBOlWo4ws
Other masking tape and protection companies include:
https://www.tesa.com/en-gb/craftsmen/tesa-and-the-pda
file:///C:/Users/User/Downloads/tesa-professional-product-catalogue-2016%20(2).pdf
Tesa: https://www.tesa.com/en-gb/consumer/renovation
Q1 Tapes: https://www.q1tapes.com/en/painting