Painting plastic nosecone of my R1

[rumpelstiltskin]

Hi,just painted the hugger of my R1 and the front mudguard,its a blue pearl colour and i've managed to get near bang on the factory finish and i'm well chuffed,so while im in form so to speak i'm trying to do the nosecone which was badly chipped and pitted,problem is that when i've rubbed down a really deep chip so i have an oval of the bare plastic,then slight ring of primer then the original basecoat,when i apply the primer right on where the bare plastic is,where the plastic finishes and the original primer starts im getting a crinkling?A ring of reaction right around where the bare plastic was!Its driving me nuts,if i've ever had this before i've just waited till its dried,rubbed it down,done it again and 9 times out of ten it goes away,this is getting ridiculous,i was using a can of cheap cellulose white primer which i was told would be the root of the problem,local paint store(top place)suggested i use HIGH-5?About three times the price of the other primer,happily trundle home to start again and it still reacts goddamit!!!I'm painting in the front doorway area of my house,warm enough,no draughts,where i done the mudguard etc i made a good job of?.Anyone any suggestions?

[Liszt]

Can't really help but my Dax Rush is painted in R1 pearl blue so I know it is a lovelly colour. The fibreglass was preped with an etch primer, then base coat, colour, drop coat then laquer. Was done using new water based professional type paints by mate in the trade, although I got to do the rubbing down.

Actually thinking about it, it was rubbed down with 180 grit first to provide some adehsion for the primer.

Regards,
Liszt

[victormeldrew]

[redacted]

[hal 1]

Like victor says you need a sealer, might be called 'isolating primer' available from everyday car spares places.