Thread: Lacquer overspray

lightly spray it over with some straight thinners, lay the boards flat and level so no runs occur, this will remelt the overspray and under lying finish together creating a smooth surface.
The problem may well the thinners as they come in differing evaporation rates fast medium and slow, this is to cater for weather conditions.

I think you'll find that its your movement more than anything else you need to spay at a constant distance not in an arc. So its you that needs to move not just your arm.

When you arc the gun from side to side your pulling the distance of the nozzle away and this causes overspray or a dusty spray as I call it.


Have a read http://www.buzzle.com/articles/spray...echniques.html

Both of the previous suggestions are on the money. When doing large panels keep your elbow up and the gun pointing straight down.

To avoid overspray,always overlap the coats by 50%
i.e. 'wet on wet' you shouldn't get runs using lacquers because the solvents evaporate too fast
If the coats are drying too quickly,use a 'retarder' thinner,but don't go overboard eh? maybe 10 - 15% total or you WILL get runs
Hope this helps
Scotty

Also with larger panels, try to spray "off the work piece" that is to say, continue with your spray motion until you have completely continued past the board and then before you come back onto the work piece, start your spraying motion as you approach the board so you don't stop the gun in one place even for a split second, As mentioned above, keep your distance from the surface constant and moving continually, don't flex or fan the wrist while spraying, Good luck.

Moisture getting into airline can cause dull spots but often with gloss the finish appears to cloud, go flat and look uneven whilst it is drying, just leave it and it all evens out.

With overspray you can pull the finish with a thinners dampened rag, not the best for full gloss finishes but great for satin and matte finishes, you can use very fine steel wool with some wax or you can use a cutting compound and buffer.

I see you are in Perth (nice temps at the moment). Temperature plays a big part. As said before 'wet on wet' and this has a lot to do the the thinners. If the thinners are evaporating to quickly you won't get a 'wet on wet'. 'Retard' thinners (doesn't evaporate as quick) if the temp is high or lightly spray over with thinners.