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How to apply Goo V2 front projection paints by Roller
Step 1 -
Choose the right roller:
We suggest using a 9" long, 1/4 inch nap (5 or 6mm), wool and polyester blend or microfiber roller. Choose a roller whose label indicates that it is for smooth or varnish or gloss surfaces and ensure the nap is less than 8mm.We do NOT recommend using foam rollers.
To get rid of roller fluff, either stroke the roller with wide sellotape wrapped round your hand or wash and leave to dry overnight.
The roller needs to be a tight fit when it is pulled onto its wire cage.
You may need to pull the wires outwards a tad to ensure the tight fit.
If you are applying 2 coats with your roller, do not wash the roller but cling film the roller. A cling filmed roller will be OK to reuse for several hours. However if you leave it wrapped overnight, its best to use a new roller the following day, as small particles will start to dry and leave an unwanted texture.
Step 2 -
Surface Preparation:
Screen Goo can be applied to any smooth paintable surface. Many materials other than the products listed below can be used successfully. For best results the surface should be flat and smooth.
If this surface to be coated is not smooth, it should be sanded down and wiped off prior to applying the Screen Goo. Porous surfaces such as drywall, gyproc, and wood based materials such as plywood, particle board, MDF, should be sealed with a flat, white latex primer prior to applying Screen Goo. Or use Goo Premier Primer. Coloured surfaces should also be primed with a flat, white latex. If your substrate is fiber glass, or metal or the substrate has a solvent or a solvent sealer, use a water based stain stopper like Zinsser Bulls Eye 1, 2,3. A typical install with plaster board would have a mist coat of Goo Primer or 'cheap matt white contractors water based emulsion'
A mist coat is 50% water and 50% paint, and this will key your substrate ready to take one further normal coat of the same paint.
You may need about 5% water adding if the paint is very thick, as we want to minimize texture, especially with 4K projectors. When masking do not cut-in with a paint brush as this could leave bristle streaks. Use a gloss radiator roller. Or better, use wide masking easy release tape.
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Step 3 -
Determination of Screen Size:
If you are painting the image area as opposed to the whole wall you need to have your projector in native mode to its pixel array.
We recommend mounting your projector in its permanent location before determining the actual screen dimensions. Once the projector is mounted you should project an image onto your surface and adjust for image geometry. The width of the image at the top of the screen should be the the same as the width at the bottom and likewise the sides of the image should have the same height. Finally you should check that the image is level and square in the corners. Now you are ready to mask off the area you will be coating with a high quality painters tape. If you intend to create a border around your screen you should allow an extra inch around all sides so that the coated surface will be slightly larger than your projected image.
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Step 4 -
How to get Goo V2 paint ready to pour:
Goo V2 Premier Primer and Goo V2 Front Projection Paint (Ref White, High Contrast, Max Contrast, Theme Park). Shake the bottle and empty the contents in a paint kettle or similar. Then add water to the bottle. For Premier Primer, Reference White, High Contrast, Max Contrast and Theme Park add 5% water, or a little more if your roller is leaving texture. Shake vigorously to ensure the pigments at the bottom of the bottle have emulsified. Add the contents of the bottle to the paint kettle and stir. You are now ready to use the paint.
Please note if your wall is bare plaster, the first coat with Premier Primer should be a mist coat with 50% water.
You only need a second coat of Premier Primer if your first coat was a mist coat. Otherwise it is a one coat primer
Step 5 -
Application:
Goo V2 is a one bottle two coat solution.
If you are using the Premier Primer as your mist coat, allow 7.5 SqM per Lt.
Allow for a coverage of approx 5 SqM per liter of the front projection paints (Ref White, HC, MC, TP) for two coats.
Place about 200mL of Goo in the paint tray to do your first coat. Do not fill the reservoir part of the tray by more than a third. Dab some paint on one side of the roller, rotate and dab some on the other side to balance the roller. Squeeze out any excess coating by rolling up and down on the ribbed platform portion of the paint tray. Make sure the roller has an even coating of paint without overloading the roller.
The roller should roll and not skid when applied on the wall. Use a 'w' motion when rolling. Keep the roller flat to the wall; there will be a tendency to put more pressure on the side of the roller with the arm - resist. The aim is to apply the paint evenly and always work from a 'wet' edge. If your project is too large to keep a wet edge please email russ@nexnix.co.uk to discuss a suitable plan. The coating density should be just sufficient to cover the underlying surface. Do not roll to leave a thick coat but roll a thin coat that will be sufficient to cover the underneath surface, without pressing the roller too hard.
It's important not to stop the roller during the finishing stroke as this could cause marks in the finished surface. The finishing stroke is a lighter stroke, and the edges need to be blended in to avoid leaving a ridge of paint.
VERY IMPORTANT!
Even after following these instructions to the letter, your wet surface will have a patchy appearance. THIS IS NORMAL! While we realize that this is a bit counter-intuitive, LEAVE IT ALONE and the surface will dry to a uniform consistency and colour. Resist the temptation to go back over your work because re-rolling the coating after it has begun to dry (about 2-3 minutes after application) will cause textural differences, potentially resulting in permanent streaks.
Very important! The finishing strokes should be done no more than 2-3 minutes after the original paint strokes in a given area. Attempting finishing strokes after this time period has elapsed will cause the appearance of roller streaks. This is the result of a difference in texture caused by re-rolling coating which has begun to dry!
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