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post #3 of (permalink) Old 6th March 2007
Technical Supremo

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Spraying Door Mirror

Oops TazzyK - Looks like you forgot to carry out one vital operation - getting rid of the silicone - the bubbles in the laquer are probably caused by a reaction to the silicone on the plastic - all plastic components either contain silicone or a have it applied to the surface during manufacture - its allows the plastic to be removed from the mould. It can be extrememly difficult to get rid of (ask any spray painter - tears will flow at the mere mention). It has a nasty habit of permeating into the paint - and once in you can't get it out. Good spray painters clean first with anti-silicone cleaning fluid (no it ain't cheap).. Failing that they can also add a special silicone to the paint - which reduces any chance of reaction (normally two alike substances won't react to eacj other. Additionally are you using two-pack paint or the straight air-dry stuff. I suggest you wait until the paint is well hardened before trying again - place it somewhere warm for 24 hours - yeh professonal painters have special infra-red lamps and ovens for the job - that's why painting cars is not cheap. Rub down with 200-300 grit paper - don't use too fine a paper as the paint needs somthing to grip onto. Whe spraying hold the paint nozzle 9-12 inches from the surface - apply thin light coats and allow to dry throughly before the next - a handy tip is to warm the surface gently using a hairdryer each time before you spray. Build the coats up gradually until you get the desired finish - don't hurry it. My mate is a car sprayer by trade and he even has probs., - especially during cold damp weather.
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