24 replies to this topic

[eean]

Evening, painted the bonnet tonight in celly primer, the bloke I bought the bonnet from warned me re the paint fisheyeing as his mini was full of fisheyes, he was flatting the wings down as I turned up to buy the bonnet, it was a full heritage shell build he was doing but selling the doors and bonnet as he wanted to use the original ones from his Cooper S, anyway, I gave it a good wet flatting down, panel wiped then primed, loads of fisheyes, I was expecting a few but there's loads.Do you think it's the kind of primer they have used, it is quite thick over the black coating? I was planning on flatting again and trying another coat but thought I'd ask,NB I did the boot lid at the same time and this did not happen so I def know it's something to do with the original primer coating

[Carlos W]

Fish eyes are usually caused by silicone

[littlewimp]

as above.

[corrado vr6]

I got fish eyes in a mini door once after spraying with a diesel heater on in the workshop.
I guess the only real way to sort it is to go back to bare metal

[David128]

clean with panel wipe then redo

[eean]

Ok so flat back, panel wipe then re prime or strip it to metal?

[Ben_O]

Strip back to bare metal, degrease it and then prime

 

If there is silicone in the paint that is on the panel then panel wiping it will make no difference.

[midridge2]

Or use anti silicone adertive.

[jonjosar]

The silicone could have been in his airline/compressor/spraygun so as Ben_0 says, strip it back.

You could try isolator,  if your still having problems, then  start with a light coat no matter what your priming with. A heavy coat seems to exacerbate the problem.

[eean]

Ok thank-you for all input, I'll strip it off
The weird thing is the curved front part of the bonnet doesn't seem to be affected, just the majority flat parts, its factory applied grey over the black stuff so god knows what's been used

[sledgehammer]

some deodorants have silicone in them & some fabric conditioners

 

wonder if anyone has ever sprayed with an auto lube in the line (not saying OP has) 

 

or used a dirty air line (air line connected to auto lube on ratchet , when released at wall , air & oil vapour rushes into the pipe 

 

pipe now has oil vapour in it

Edited by sledgehammer, 14 December 2015 - 11:11 PM.

[eean]

Don't known but this seems that way, the bloke I got it from bought the complete heritage shell and it all came in this thick grey primer over the black stuff, wouldn't like to have bare metalled a whole shell lol

[Ben_O]

Ok thank-you for all input, I'll strip it off
The weird thing is the curved front part of the bonnet doesn't seem to be affected, just the majority flat parts, its factory applied grey over the black stuff so god knows what's been used

If the bonnet was laid flat when the paint was applied, sillicone in the air might have landed on the paint. It might explain why only the flat part was affected

[eean]

Well, I bare metalled it, I can't believe how much paint was on it, I 320 DAd it, I panel wiped it thoroughly, it states on the can it is a professional degreaser for paint prep etc, I etch primed, left it over night then primed tonight even worse!!
So I wiped it all off with thinners, went to the paint shop and got some fresh panel wipe, they explained that's all they sell to degrease, so DAd it again, panel wiped 3 times and etch primed only thin mist coat, let it set and dry properly then primed, still had a little bit of fisheye, so lagged the rest of the primer on I had left after flashing off and it seems OK?! Mental, never seen nowt like it, am going to leave over night then flat it and give it a light top coat before a good coat then leave it and see what happens. What a pain in the rear!

[midridge2]

Should have used anti silicone addertive, you still have silicone in the primer coat.