Paint chipping off over rear wheels

Technical and Repair Discussions

New Member
New Member
Posts: 6
Joined: Sat Jul 26, 2014 8:45 am
PostPosted: Thu Jul 30, 2020 6:33 pm
Has anyone else had issues with this. Fresh paint job and the paint on the rear section is coming off in small pieces, with lots of cracking. Never had that problem as a gen2. Dealing with it for a second time now. Thinking of doing some reinforcement under that area, with another layer of Matt and resin, and or a thin layer of foam and resin like they do in the marine industry. Also looked at thin rubber adhesive backed pieces to apply, but worry about them coming off in the heat.
User avatar
Needs a Life!!!
Needs a Life!!!
Posts: 253
Joined: Wed Nov 30, 2011 2:50 pm
Location: Augusta, GA
Chassis:
494
PostPosted: Mon Aug 03, 2020 6:39 pm
It's hard to say what caused it, without knowing what preparations you took before painting. It sounds like the paint either didn't adhere to the primer or the primer didn't adhere to the fiberglass. Do the paint chips have primer showing on the back, or is fiberglass adhered to the paint chips?
Kurt Breitinger
SEDIV #28
Chassis 494

New Member
New Member
Posts: 6
Joined: Sat Jul 26, 2014 8:45 am
PostPosted: Wed Aug 05, 2020 12:34 pm
Hi Kurt,
The paint isn't adhering to the primer. Interestingly, as a Gen2 I never had this problem, but that may not be relevant, as the tail was repainted of course with the Gen3 conversion. Didn't happen at Daytona, but noticed it at Road America last August, which has some pretty serious curbing, which you use in places, so I felt it was a vibration issue. Had it repainted over winter and first time out at Summit Point, it started happening again. Looking at some other SRF's in the paddock, I could see where it looked like there were signs of similar cracking.
User avatar
Ready to Write a Book
Ready to Write a Book
Posts: 57
Joined: Sun Jul 06, 2014 11:14 pm
Location: Los Gatos, California
Chassis:
281
Facebook Page:
https://www.facebook.com/Accelracetek-285423508982
PostPosted: Wed Aug 12, 2020 12:31 am
This is a common problem with all fiberglass and carbon bodies. Some of the rear sections have a thin fiberglass just above the tires. The sticky tires hold onto rocks and then when they come off they impact the fiberglass and cause it to deform and then the paint cracks. The best way to eliminate the problem is to put an extra layer of fiberglass on the inside of the wheel wells where the rocks hit and where the cracks are. Make sure you rough sand the old fiberglass before applying the new layer and it is a good idea to use cloth and not mat.
If you want to do even a better job buy some structural core material for composite laminates either foam or honeycomb. This will make the wheel wells really strong and will not crack.
https://www.fibreglast.com/product/Nomex_Honeycomb_1562
https://www.fibreglast.com/category/Foam

Return to Technical and Repair Discussions

Who is online

Users browsing this forum: No registered users and 5 guests


cron