What is causing this

cbr1100xx · 9th October 2016, 15:44

Hi , painting the mudguard on my bike and the last time it was painted the paint cracked after it was lacquered , so took a palm sander to a bit of it yesterday and primered with high build primer , went back to it today and its gone like this , any help much appreciated

fega72 · 9th October 2016, 19:31

Quote:

Originally Posted by cbr1100xx

Hi , painting the mudguard on my bike and the last time it was painted the paint cracked after it was lacquered , so took a palm sander to a bit of it yesterday and primered with high build primer , went back to it today and its gone like this , any help much appreciated

The same thing happened to me when I painted my bike's fuel tank:

Help With Troubleshooting Paint Problems

cbr1100xx · 9th October 2016, 21:10

Thanks for that , it looks like sanding blisters for me then , only the front mudguard , tank , both side fairings to go!!!

trikey · 11th October 2016, 22:11

Looks like a paint reaction caused by a mix of the wrong type of paint.

Flat it smooth then a good coat of stopper before you prime and all will be well.

kbonney88 · 12th October 2016, 14:50

It could also be shrinkage of the paint due to too cold of a temperature either during or after painting.. primer filler is alot thicker remember...

... I agree with paint reaction too - but I have defo had it due to temperature..

cbr1100xx · 12th October 2016, 15:55

Not temperature , garage is heated , plus painted during the day , about 15 degrees outside , originally painted and after about 2 weeks was lacquered and the paint looked like it was cracked about a week after that , I then sanded the mudguard back and primed and this was the result , I'm leaning towards the lacquer causing it ,
Thanks for all the info so far

Thorfin · 12th October 2016, 16:15

We have seen similar when we use water based paints (The Law for most things now) and 2K lacquer. The lacquer seems to react to the paint...

Are you using Water based paints or 2K paints? (Bikes are still ok for 2K iirc)

cbr1100xx · 12th October 2016, 16:43

The original black was halfords rattle can and not sure about the lacquer as this was done by someone else , and the primer is also halfords rattle can ,
The person who did the lacquer hasn't got a professional set up(own garage)so not sure on what he would of used and can't check with him as he has moved on

Thorfin · 13th October 2016, 09:49

You can get 2K lacquer in spray can form from http://www.specialistpaints.com/coll...at-kustom-canz

The fan from those "Kans" are awesome for a can

and they deliver direct to your door... They also have a good range of colours for the base coat too.

My partner runs an Airbrush company and has access to various paints and bodyshops if we can be of any assistance

cbr1100xx · 13th October 2016, 17:40

Thanks for that , I am planning on stripping and rebuilding the bike between now and about march/April , would it be possible to airbrush the Honda wings logo on the tank , my only concern being Honda have been known to prosecute people for using the Honda logo , but then they would have to know who did the work

If it is poss I could leave the tank with you for a month or so , so there wouldn't be any rush.

9th October 2016, 21:10	#3
cbr1100xx Gets stuck in VW touareg Join Date: Mar 2015 Location: dunsop bridge Posts: 870 Thanks: 225 Thanked 414 Times in 235 Posts	Thanks for that , it looks like sanding blisters for me then , only the front mudguard , tank , both side fairings to go!!! __________________ WE WERE BOTH BORN ON THE 4th of JULY CAR DIED 15/11/2022---I'M STILL GOING (JUST)

11th October 2016, 22:11	#4
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,765 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	Looks like a paint reaction caused by a mix of the wrong type of paint. Flat it smooth then a good coat of stopper before you prime and all will be well. __________________ Lest we forget..

12th October 2016, 15:55	#6
cbr1100xx Gets stuck in VW touareg Join Date: Mar 2015 Location: dunsop bridge Posts: 870 Thanks: 225 Thanked 414 Times in 235 Posts	Not temperature , garage is heated , plus painted during the day , about 15 degrees outside , originally painted and after about 2 weeks was lacquered and the paint looked like it was cracked about a week after that , I then sanded the mudguard back and primed and this was the result , I'm leaning towards the lacquer causing it , Thanks for all the info so far __________________ WE WERE BOTH BORN ON THE 4th of JULY CAR DIED 15/11/2022---I'M STILL GOING (JUST)

12th October 2016, 16:15	#7
Thorfin Loves to post MG ZT-T CDTi & MG ZS 180 Join Date: Aug 2011 Location: Dyfed Posts: 457 Thanks: 29 Thanked 22 Times in 20 Posts	We have seen similar when we use water based paints (The Law for most things now) and 2K lacquer. The lacquer seems to react to the paint... Are you using Water based paints or 2K paints? (Bikes are still ok for 2K iirc) __________________ I saw that show, 50 Things To Do Before You Die. I would have thought the obvious one was "Shout For Help".

12th October 2016, 16:43	#8
cbr1100xx Gets stuck in VW touareg Join Date: Mar 2015 Location: dunsop bridge Posts: 870 Thanks: 225 Thanked 414 Times in 235 Posts	The original black was halfords rattle can and not sure about the lacquer as this was done by someone else , and the primer is also halfords rattle can , The person who did the lacquer hasn't got a professional set up(own garage)so not sure on what he would of used and can't check with him as he has moved on __________________ WE WERE BOTH BORN ON THE 4th of JULY CAR DIED 15/11/2022---I'M STILL GOING (JUST) Last edited by cbr1100xx; 12th October 2016 at 16:46..

12th October 2016, 14:50	#5
kbonney88 I really should get out more....... Rover 75 Tourer & 75 Saloons Join Date: Apr 2012 Location: Perth/Glasgow Scotland Posts: 2,313 Thanks: 804 Thanked 656 Times in 512 Posts	It could also be shrinkage of the paint due to too cold of a temperature either during or after painting.. primer filler is alot thicker remember... ... I agree with paint reaction too - but I have defo had it due to temperature..

13th October 2016, 09:49	#9
Thorfin Loves to post MG ZT-T CDTi & MG ZS 180 Join Date: Aug 2011 Location: Dyfed Posts: 457 Thanks: 29 Thanked 22 Times in 20 Posts	You can get 2K lacquer in spray can form from http://www.specialistpaints.com/coll...at-kustom-canz The fan from those "Kans" are awesome for a can and they deliver direct to your door... They also have a good range of colours for the base coat too. My partner runs an Airbrush company and has access to various paints and bodyshops if we can be of any assistance __________________ I saw that show, 50 Things To Do Before You Die. I would have thought the obvious one was "Shout For Help".

13th October 2016, 17:40	#10
cbr1100xx Gets stuck in VW touareg Join Date: Mar 2015 Location: dunsop bridge Posts: 870 Thanks: 225 Thanked 414 Times in 235 Posts	Thanks for that , I am planning on stripping and rebuilding the bike between now and about march/April , would it be possible to airbrush the Honda wings logo on the tank , my only concern being Honda have been known to prosecute people for using the Honda logo , but then they would have to know who did the work If it is poss I could leave the tank with you for a month or so , so there wouldn't be any rush. __________________ WE WERE BOTH BORN ON THE 4th of JULY CAR DIED 15/11/2022---I'M STILL GOING (JUST)