Hi guys, it will probably be ok , but i was advised by Standox that sometimes can
make future problems . Its a gamble men. As a rule you always acid etch primer on steel. prior any spraying . Just don't use acid etch primer on grp. A two pack
1.1 grey primer will be fine , you only need a mist coat not solid prime.
My advise with getting your car nice and smooth after all the filler work is done.
A product called re face, you will need a big nozzle 2.3 or bigger. You can spray it on very heavy , it will level and fill in any pin holes and make it a consistent finish.
What this is , is a spray filler. it takes 20 minuets to dry and you only block it dry as due to being very porous and will hold moisture. Any way once this has been dry blocked and a nice finish we then repeat using a High build 4.1 primmer . this then can be wet blocked/.Hope this helps.
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