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.
Ain't nothin' like the wind in your hair.
vwbugsrule wrote: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.
It may need to be prepped with the POR 15 stuff...
All the stuff painted I have seen, it has been perfect ...
Did You wear gloves when preparing it..?
as mentioned a finger print can cause problems..
LEE
- Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY---
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.
71 notchback,
Past owner of, 70 NB, 73 SB and 72 FB TLE
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.
Flintstones wrote: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
sound like someone is a n00b or should I say experienced stubborn person.
normal painting rules do not apply to por15. Read the instructions and use their system.
71 notchback,
Past owner of, 70 NB, 73 SB and 72 FB TLE
vlad01 wrote:Flintstones wrote: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
sound like someone is a n00b or should I say experienced stubborn person.
normal painting rules do not apply to por15. Read the instructions and use their system.
sounds like your a bit of a keyboard warrior to come out with a comment like that
🤓
vwbugsrule obviously wasn't happy with the end result after they used POR15.
The instructions are fairly simple to follow using the POR15 system, so it's not about if we had used the products properly.
I offered my opinion as I have used the product and I was not happy with final finish for the standard that I'm after.......
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.
71 notchback,
Past owner of, 70 NB, 73 SB and 72 FB TLE
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 😀
71 notchback,
Past owner of, 70 NB, 73 SB and 72 FB TLE
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 ....
Greg Gordon-Lane
Brisbane
Vw's are part of life's journey .... get on board!
VW Safari / Thing 1976 - "A work in progress"
Ducati St4s - "Poetry in motion"
