Painting - what am i doing wrong ?

[Kiwi]

Just started getting into bike restorations, doing my own painting. When i start to tighten up the nuts and bolts, the paint chips or splits. What am i doing wrong ? too much paint ? wrong type of paint ? especially on the motor and frame. On the motor i sand blasted parts right back, primer then engine paint, but the paint chips or splits. It's very frustrating, especially when i look at the paint job and think wow this is going to look good, and then that happens.

[oldfart]

Thin coats works for me ,( I use POR 15 on engine cases )  and a bit of vaso on the faces of screws 

[Kiwi]

Yeh i'm starting to think, after googling my problem that it's too much paint. Oh well, learn by your mistakes i guess.

[Kiwi]

Do the engine cases need to be primed ? are they supposed to be etched primed ? i just used a basic supa cheap primer. VHT engine paint any good ?
also if you use a VHT primer, should you stick to VHT for top coat ?

[Davey Crocket]

I just blast em, blow them off, prepsol them and then paint them with VHT GM Satin Black. Wait a couple of minutes, give them another coat, wait another couple of minutes, get the heat gun and give them a hot blow job (settle down you devietes) then walk away and leave them alone for a few hours (to relax after there blow job). You can also put them out in the sun (if you live in QLD).I also like to use car type wash n wax to look after them, stay away from acid based cleaners like CT10 ect and it will look good for years. Cheers John.

[Rossvickicampbell]

I agree - standard etch primer - maybe 2 coats for coverage then I like VHT Brake and Caliper Satin Black as it is same temp resistant as the engine paint but also chemcial and chip resistant - same again just enough for coverage and then leave to cure - haven't had the problem you mention except with a bad powdercoat job!

cheers

Rossco

[Husabergpete]

I do the same as Davey with an etch primer then VHT then I stick it in the oven like it says on the can. Around 100 degrees C for an hour or so then let it cool down overnight. Stinks the house out but.

Pete

[Rossvickicampbell]

I live in Western Australia - just leave it in the sun for a while and saves on the oven job!!!!