Cracking Paint

[barry d 6]

hi im spraying primer on a fibreglass bonnet and in three different spots the primer seems to be cracking .sanded it down again last night and sprayed again.help please as i dont know what to do next.

[stu8v 68 1 Cars]

Sounds like it could be that the paint hasnt been mixed correctly or its been over thinned.

 

Failing that a temperature issue?

[Kezzer30 40 1 Cars]

Any polish or silicon could have been near it ? Sound like a reaction , you can get some easy flow drops for about 7 quid last a fair few times aswel .

Ps are u using cans or proper gun etc

[barry d 6]

im using a proper gun in a heated garage.half of the bonnet is fine its just a few spots where its cracking

[Kezzer30 40 1 Cars]

im using a proper gun in a heated garage.half of the bonnet is fine its just a few spots where its cracking

Heated garage lucky you haha and hmm its strange i had a bad laquer problem where it starte reacting on everything i sprayed turned out it was silicon so the drops cured it , very silly question but have u used proper panel wipe on it?

[barry d 6]

ya i used panel wipe.where do u get the drops and how do u use them.?im going to sand the cracked parts down tonight and repaint tomorrow just dont want it to crack again.

[Kezzer30 40 1 Cars]

Just nipped into garage and took a photo for you mate

 

 

These are what your after and most decent paint shops shoul have them all you do it put a few drops into your primer , paint or laquer mix and it works a treat lad , i use them all time to minumise reactions