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Painting a horse trailer


jbright
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I bought a gallon of the rust blast and a gallon of the silver rust sealer. I removed all of the flakey rust and loose paint with a 5" wire wheel on my side grinder. I then sanded the entire trailer(outside) with 80 grit. I then used the rust blast in the spots where there was active rust. I did small areas at a time so I could keep it wet for at least an hour. I washed off the trailer and painted the entire trailer with a thin coat using a brush so I could get every nook and cranny. Any of the areas that had a run or if the paint was heavier, the paint drys with a "beaded up" look. Looks terrible. Those areas have to be completely sanded down almost to metal. So I decided to spray the second coat on to get a more uniform coating and wound up with the same thing. Anywhere the paint is a little heavy, it drys looking like sandpaper. Could it be temperature related? I realize that I'm not going to get a showroom finish unless I topcoat it, but this just looks bad!


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Here is a Great Fix-It Guide for you: http://www.kbs-coatings.com/fix-it-guide-rustseal.html


AIR/MICRO BUBBLES


Small bubbles in or on the paint film.


CAUSE:

Liquid solvent (thinners/reducers) becomes "trapped" in the paint film when the surface layer skins over too quickly, preventing their evaporation into the atmosphere. Solvents that vaporize within the paint film leave bubbles, pinholes or craters as they push through and "pop" the surface. Solvents can be trapped due to:


1. Thinner/reducer evaporating too fast for spraying conditions.

2. Inadequate flash time between coats.

3. Excessive film thickness or "piling on" of heavy/wet coats.

4. Too hot and/or too humid conditions.

5. Too much air movement causing coating film surface to "skin over" before solvents evaporate.

6. Excessive purge/flash time before force drying.


REPAIR:


1. Sand smooth with 320 or finer grit sand paper, and recoat.


PREVENTION:


* Apply THIN COVERING coats.

* Avoid allowing coating to puddle/pool in low areas.

* Allow each coat to dry to the touch (no longer sticky or tacky) before applying subsequent coats.

* Use correct solvent for proper evaporation rate.

* Avoid too hot/humid atmospheric conditions (ideal = 55°-82°F/13°-28°C)

* Maintain correct spray gun speed & distance.

* Use the recommended air pressure.

* Use the correct air cap/nozzle/needle recommended.


Please let me know if that helps you and if you have any additional questions. We are here to help.


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