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. You will need minimum of two rollers - one for the two coats of 'Reflective' and one for the two coats of 'Finish'.

 

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.

Allow for a coverage of approx 5 SqM per liter of the front projection paints ('Ref White', 'High Contrast', 'Max Contrast', 'Ultra Max' also known as 'Theme Park') for two coats. 

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.

How to apply Goo Classic (Reflective, Finish) ie 2 bottle solution, front projection paints by Roller

 

Step 4 -

Basecoat (Also known as Reflective Coat):

Shake the bottle and empty the contents in a paint kettle or similar. Then add water to the bottle about 10% and shake the bottle again and pour into the paint kettle and mix.Place about 200mL of Goo in the paint tray to do your first coat. This should be no more than a third of the reservoir of the paint tray.Dab some paint on one side of the roller, rotate and dab some paint on the other side of the roller.Squeeze out any excess coating by rolling on the slanted portion of the paint tray. Don't press too hard.  

Then roll the coating in random 'W' starting top left and keep one wet working edge. The coating density should be just sufficient to cover the underlying surface. The roller should roll and not skid when applied on the wall.When the roller has very little paint left on it. You?re now ready to do your first finishing stroke.  

The wire support side of the roller mechanism naturally presses harder on the surface of the screen, so keep the roller flat to the wall, and use just enough even pressure to get the roller turning.

It's important not to stop the roller during the finishing stroke as this could cause marks in the finished surface.Allow the Basecoat to dry thoroughly (typically 1-1.5 hrs.) and then repeat the above procedures for the second layer of Basecoat.

Step 5 -

Topcoat (Also known as Finish Coat):

Two coats required, NEAT from a well shaken bottle.
Note that shaking the bottle needs to be vigorous to ensute those expensive optical pigments have left the bottom of the bottle.
Pour into a bucket large enough (in case bottles are from a different batch)to take all the Topcoat and stir.
After allowing the Basecoat to dry, carefully repeat the above procedures to apply two coats of Topcoat.
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 streaks.
This is the result of a difference in texture caused by re-rolling coating which has begun to dry!

Resist the temptation to go back over your work with the roller on a wet screen.
UNLIKE BASECOAT, THE TOPCOAT LAYERS MUST NOT BE SANDED OR ABRADED UNDER ANY CIRCUMSTANCES.
It is better to apply as thin as possible without too much pressure on the roller, but leaving just enough paint on the wall to cover the previous layer.

*With the top coat - three really thin coats is better than two thick coats.*


EACH COAT MUST BE ALLOWED TO DRY before the next coat is applied - dark patches mean the coat hasnt dried.
You will know by sight when the next coat is ready to be applied, as the existing coat will dry to a consistent lighter colour.


If your screen is over 2.4M off the ground, best to email russ@nexnix.co.uk or
phone +44 (0)1243 696746 for a discussion on keeping a 'one wet working edge' stratergy.