Solutions to most common problems with Vinylast Paints
Paint is flaking (peeling) or rust has developed:
Many times the problem is traced back to thinning the paint excessively. Please note that for a conventional sprayer no more than 10% thinner should be used.
The work may not have been well prepared before painting, or not painted evenly to the recommended film thickness. The recommended film thickness is 200 microns wet and 80 microns dry. For coastal environments, apply 125 microns dry film thickness.
Another suggestion is to use a different color as a first coat. For example, we usually use grey under black to ensure that the sprayer covers every part at least twice to ensure the correct minimum film thickness. Black on black is hard to see and therefore difficult to cover correctly. You can use ANY color as a base to ANY other so never need to have any waste material.
The paint is peeling off a galvanized surface:
Which type of castings are used in the rails? Some are not suitable for galvanizing, and may not galvanize very well.
But generally just follow the paint instructions. Clean off any sharp or unsightly bits on the newly galvanized work. The work MUST be clean and dry and free from dust, oil or grease when the paint is applied and you MUST apply to the recommended dry film thickness. Minimum 80 microns, up to 125 microns in adverse locations.
(This section doesn’t really sound right. Some castings can cause a problem and do not galvanized well, but this is a different issue really.
Peeling can be caused by applying too much paint.)
The paint is not drying and is very soft:
The thicker the coating, the longer it will take to dry - but you do need to get to the recommended dry film thickness. We also tend to let the first coat dry before putting the second coat on it to let some of the solvent evaporate.
A very thick coating will surface dry and trap the residual solvent in the film which then acts as a plasticiser keeping the film soft and if damaged or removed you would find residual solvent smells. (See peeling!)
The hardness development reduces significantly when too much paint is applied - it can stay soft for days, but will harden over time
The more thinner is used the longer the drying time will be
The color of the paint does not match the color on my previous order.
If you’ve painted and installed a job outside several years ago, and then added some new work or repainted a part recently, then a difference can sometimes be noticeable as all paint changes in sunlight over a period of time. However, if you painted a job last week and opened a new can of the same color which was noticeably different, then something is amiss. In this case please make an note of the batch number on the base if the can or date and colour on the front label.
It can also depend on having a consistent thickness of paint. A thicker coat will often give a higher sheen level. A very thin coat will look flat and dull. With a little practice the operator will become skillful and always apply a consistent finish.