On my current project I am using ppg jp377 epoxy primer and jp202 surfacer. No problems so far. I have followed the instructions to the t. Noting the tech data sheets and advice from the paint shop And of course the hamb. However the jp377 has been on for over 6 months. TDS says scuff and reapply after 3 days. Im close to ready to topcoat With ppg concept single stage gloss black but have a few minor lows That need surfacer. Heres the question; Scuff and sealcoat entire car then fill small areas with surfacer. (MAY TAKE MORE THAN 3 DAYS AGAIN) Or can I scuff and spot in lows with jp 202 then seal entire car with jp377 Or scuff then do whole car in jp202 surfacer, guide coat And block everthing again. I have tried a few tests spots with just scuffing and spotting jp202 in with good adhesion for 4 weeks. But for long term with a topcoat I am skeptical. Also any pre cleaning sugestions are welcome Thanks in advance.
I have always wet sanded the whole car with 400 paper and recoated with Epoxy and then within 8 hours, reapply the Fill Primer. The 3 day rule is very important because the Epoxy "closes up" by the 72 hour "window". You never want to mess with Epoxy that is outside the window. IF the whole car is JP202, you can sand the whole thing, spot fill with a glaze and just spot in the low areas that you reworked with JP 202. After you are Happy with everything, sand to 600 (dry), seal and paint. Good Luck, VR&C.
@ voodoo thanks Thats the clearest advice I have had yet. A lot of work but nothing compared to what I have behind me. Posted using the Full Custom H.A.M.B. App!
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