SURFACE PREPARATION AND APPLICATION PROCEDURE
New or restored bare Wood. In order to obtain “closed-pore” smooth surface, apply 1 coat of POLIGLASS varnish (code 5X0000) diluted up to 50-100% with Thinner 203 (depending on wood absorption). Let dry and then apply 2-3 coats of POLIGLASS GEL UV varnish diluted  30-40% with Thinner 203. Afterr 10 hours sandpaper with fine abrasive paper and apply 2 coats of finishing varnish such as SPACE CLEAR UV or ACRIGLASS UV.
Previously Varnished Wood. Sandpaper the old varnish thoroughly and remove dust. If the old paint system was made with two-component polyurethane varnish, just overcoat with 2-3 coats of POLIGLASS GEL UV varnish allowing 8-10 hours between coats. If the old paint system is unknown it is recommended to test the new varnish on a small area to check if POLIGLASS GEL UV  is compatible with the old varnish and to make sure that the old coating is still in sound condition and does not soften when overcoated; if there will be no inconvenient apply 2-3 coats of POLIGLASS GEL UV varnish. In the case of loose, powdery or non-compatible old varnish, it is recommended that the old varnish should be stripped completely down to bare wood with a paint-remover or by scraping and sandpapering. Once back to bare wood follow the recommended coating system as indicated above for new wood.Wet on wet technique. The varnish may be applied by wet on wet technique. When this application method is used, care should be taken in order not to exceed the paint thickness applied in each single coat as this could lead to solvent entrapment and impair the final result. The more time is allowed between coats and the better is  (e.g. a minimum of 15-20 minutes at 20°C at least is advisable). By using the wet on wet technique the sandpapering process it is obviously not necessary; this technique must never be used  for the application of the first coat of varnish direct onto wood substrate but only starting from the second coat (for best results in fact the first coat should be left to dry for at least 24 hours).