[lesmw0sec]

When using an ironing method and also using hydrochloric acid as etchant, for touching up missing bits of toner, I make up a solution of ABS filings with acetone. I've discovered that the 'etch resist' pens are no good with HCl, as the acid attacts the pen material. The benefit of the ABS mixture is that it is easilly cleaned off after etching with acetone - which is in any case, best for removing the toner.