Frame Touching up - stove enamel paints

arlowood
arlowood Posts: 2,561
edited September 2010 in Workshop
Just about to start fettling up my old Mercian Audax which has developed a few small rust bubbles in the paintwork over the last 14 years of use.

Got my sample of touch up paint today from Mercian but they warn that it is a stoving paint and as such will not air dry. They suggest using a hot air blower to ensure that the finish will harden and set sufficiently.

However they were a bit vague about what temperature is required and for how long the paint must be heated to effect a good stable finish.

Anyone out there had any experience of this. Will a fan heater or hair dryer suffice and if so how close should it be to the painted frame to do the job?

Comments

  • Haven't done it myself so unable to help you except to say that I believe it has to be pretty hot, so not sure how much of a DIY job it is.

    I used model enamel to touch up my frame. That works fine Humbrol have a massive colour range - could you colour match?.

    Car paint works too, albeit quite thin.
  • arlowood
    arlowood Posts: 2,561
    Haven't done it myself so unable to help you except to say that I believe it has to be pretty hot, so not sure how much of a DIY job it is.

    I used model enamel to touch up my frame. That works fine Humbrol have a massive colour range - could you colour match?.

    Car paint works too, albeit quite thin.

    Considered using car enamel but problem is that my frame is one of the "pearlescent" finishes and I think I would struggle to find a good match.

    Will probably just have a go with a fan heater positioned fairly close to the frame and keep checking to see what happens. Read somewhere that stove enamels need 120degC for curing so I think this is achievable with a fan heater or hair dryer.
  • I've baked on non-iso 2 pack lackers before using halogen lights, these things really heat up the area well and are cheap, added advantage is that you can really see what your're doing. Apply small amounts at a time and build up the layers to achieve the same level as the finished paint, do you need a laquer on top of this pearlescent paint?
  • I've got a couple of car touch up paints, for steel and alu bike, of course keeping the steel protected is important (and the factory paint quality doesn't seem too great) It's a bit darker than the frame paint, but doesn't really matter. In 10+ years I may get it resprayed.
    Say... That's a nice bike..
    Trax T700 with Lew Racing Pro VT-1 ;-)
  • arlowood
    arlowood Posts: 2,561
    Robert456 wrote:
    I've baked on non-iso 2 pack lackers before using halogen lights, these things really heat up the area well and are cheap, added advantage is that you can really see what your're doing. Apply small amounts at a time and build up the layers to achieve the same level as the finished paint, do you need a laquer on top of this pearlescent paint?

    Yes. I asked at Mercian and they said their frames are finished with a clear lacquer but they don't supply this. Will probably check out Halfords. I'm sure a clear coat lacquer for car metallic paints should do the job.