I painted my petrol tank with POR 15 and i have noticed that it has some sort of pitting when it has dried. I prepared the metal to a nice smooth finish and it was all nice and clean. I am confused why it has this unsmooth finish. Can anyone help me, and tell me why this has happened?
Thanks guys.

If you put it on too thick bubbles can occur (from experience)
PS .I read instrucions after.

hahaha yes, i read the instructions before thankgod but they are not really bubbles.... its nore like pitting..... i have no idea why it is like that. Do i nead the por 15 preping stuff ?

I am assuming you painted the outside with the standard black POR-15, not the inside with the fuel tank sealer?

I have always used it on surfaces prepared with Marine Clean and Metal Ready or sand blasted and generally have had no problems. Occasionally I have seen the little pits. It is good stuff, but performance is strongly linked to preparation. You need to clean and prep it with the POR stuff and wear gloves the whole time you are working. I found that even a finger print can be enough to cause problems. The pitting you have described sounds like there was some surface contamination which has stopped it from sticking. Are there little dots where there is no paint?

For best results you should strip all the paint off and start again. If the pin holes are only in one area, you could just sand that area off again and start again.

From my experience, cleanliness is of utmost importance in order to get a good finish. You really need to follow the instructions to the letter to get the best results.

no i didnt use gloves.... i will just sand it back down and do it again and leave it at that.
Thanks for that guys.

did you stir the paint properly like the instructions say? if you stir it too hard or shake the tin this will make it all pitted.

you need to prep it first, marine clean, metal ready, por15 paint over the top

If you really want a great finish to your tank, strip it and paint it in 2PAC.

POR15 i found is so inconsistent. I painted my chassis in the grey, it's never seen sunlight (cause UV breaks it down-their words not mine) and it looks like crap.
so much so that I'll be stripping it and redoing in 2PAC cause it's not to the standard that I'm after.

Cheers
D

Even the type of gloves can cause contaminents. It sounds like oils of some type. Even the environment you paint in. If you have used an oil spray of some type in the area recently ish you can have a contaminated paint job. The line that provides the air is also a contamnant. Do you have a line purifier... if thats even the right word? Think about how ofte you get a greasy mointure out of you air blower...
Good luck. The more you learn the more there is to learn.

have you considered the humidity? spray gun? pressure? compressor air quality? All this is mentioned in detail on the data sheet and instructions.

I have seen por15 with proper preparation and top coats from their range yield show room finish.

So yeah its all down to the technique. por15 is by far the best paint product I have ever seen for the job it does.

I used POR 15, good result, I was too stingy to but the POR prep. gear and used Shellite as the last clean before painting and had no problems, came up like glass, I would guess comtamination of some sort might cause the "pitting" look.

yes and a whole heap of other variables too.


you should see their top coat

use rust paint, works real well, durable, nice in gloss black

I am using Rust Bullet with the clamshell black top coat ... great gear .... the good thing is you can paint over the Automotive protectant or use the clamshell black individually ...combined it makes for awesome protection and look great!
Can get it through PPC in Nambour, Queensland ....